The grinding teeth have assumed the rhinoceros-like pattern and the premolars resemble the molars in form; on the other hand, the front teeth, incisors and canines, have become very small and are useless as weapons.
In the lower jaw there are also one or two small and early deciduous premolars; third premolars of both jaws formed on the same type as that of the rat-kangaroos, but relatively much larger; molars rudimentary, tubercular.
Premolars compressed, pointed; and the molars with quadrate tuberculated crowns.
First two premolars with compressed and sharp-pointed crowns, and slightly developed anterior and posterior accessory basal cusps.
The first upper incisor is much larger than the others; canine and first two premolars rudimentary.
In all cases a more or less full series of teeth is developed, these being differentiated into incisors, canines, premolars and molars, when all are present; but only a single pair of teeth in each jaw has deciduous predecessors.
Premolars with compressed crowns, increasing in size from before backwards.
It may be added that the division of these teeth into premolars and molars in figs.
In the nearly-allied genus Taxidea the dental formula is as in Meles, except that the rudimentary anterior premolars appear to be always wanting in the upper jaw.
In common with the true palm-civets, they have a dentition numerically identical with that of Viverra and Genetta, but the cusps of the hinder premolars and molars are much less sharp and pointed.
The number and general arrangement of the teeth are as in Paradoxurus, but the premolars are peculiarly elongated, compressed, pointed and recurved, though the molars are tuberculated.
The dentition of Putorius differs from that of Mustela chiefly in the absence of the anteriorpremolars of both jaws.
The general type of dentition is feline, but in some instances more premolars are retained, as well as a small tubercular molar behind the lower carnassial.
Cercoleptes again resembles Leptarctus in having only three premolars in the lower jaw; the middle one, however, has only a single cusp upon the crown, whereas Leptarctus has two.
The specimen consists of the right ramus of the lower jaw, carrying the third and fourth premolars and the canine.
The maximum number of teeth is 36, there being typically two pairs of incisors and three of premolars in each jaw.
In the more typical Lemuridae there are two pairs of upper incisor teeth, separated by a gap in the middle line; the premolars may be either two or three, but the molars, as in the lower jaw, are always three on each side.
The ridges on the first two premolars are also more numerous and somewhat oblique (fig.
In Macropus giganteus and its immediate allies, the premolars and sometimes the first molar are shed, so that in old examples only the two posterior molars and the incisors are found in place.
The teeth which precede the premolars of the permanent series are called either milk-molar or milk-premolar.
When there is a marked difference between the premolars and molars of the permanent dentition, the first milk-molar resembles a premolar, while the last has the characters of the posterior molar.
Neurotrichus) gibbsi of North America, in which the premolars are 3/4.
There are only three pairs ofpremolars in each jaw.
Between the canines and premolarsis a space called the "bars" of a horse's mouth.
The incisor teeth, three below and three above, developed more and more into effective nippers, and the premolars and molars into grinders of the most delicately complicated and complete kind.
Lower premolars with four counterfolds; lower molars with three each.
As soon as the third molars show wear, the premolars and first molars have the counterfolds isolated in the occlusal surfaces as enamel islands.
The forms from the remaining part of the area occupied by the genus have premolarssmaller than the first molars, the first molars smaller than the second molars, but the second molars larger than third ones.
The capital letters P and M designate premolars and molars, respectively, of the upper jaws; lower case letters p and m designate corresponding teeth in the lower jaws.
Lower premolars with four counterfolds and lower molars with only three.
In all forms of southeastern Brazil the premolars are larger than the first molars, the first molars are larger than the second molars, and the second molars are larger than the third molars.
In all the dentition is of the hypsodont type, with the hollows of the cheek-teeth filled by cement, the premolars molariform, and the first small and generally deciduous.
The relative smallness of the premolars distinguish it from the Orang.
The earlier forms had the full series of 44 teeth, with the premolars simpler than the molars; but in the later types the canines and some of the incisors disappear, and at least the hinder premolars become molar-like.
He has four more premolars than the typical cat, and the large grinding teeth are conical, blunt and very powerful, the base of the cone being belted by a strong ridge, and the general structure is one adapted for crushing rather than cutting.
There are three small upper premolars between the quasi-canine tooth and the large scissor-toothed premolar, which is much developed.
The teeth in some degree resemble Erinaceus, the molars and premolars especially, but the number in all is greater, there being forty-four, or eight more.
It may interest my readers to know which are premolars and which are molars.
Therefore, the H-pattern of the premolars is retained throughout life.
The primitive pattern is retained in the premolars of all known Geomyinae.
The original material included a right ramus bearing the premolar and first two molars (the holotype) and five isolated premolars and molars.
Primitive Morphotype In the earliest known geomyids from the Upper Oligocene and Lower Miocene, the premolars and molars are biprismatic and bilophodont.
Actually, the highly specialized upper and lower premolars and third molars of the entoptychines rule them out as ancestors of the later geomyines.
Some of the fossil premolars in initial stages of wear have continuous and uninterrupted bands of enamel.
Obtuse re-entrant angles persist in premolars of young individuals of Irvingtonian species, but the adults are characterized by well-compressed folds, as in Recent species.
These probably did not evolve from the subfamily Entoptychinae because the dentition of entoptychines, especially the premolars and third molars, was already highly specialized by Miocene time.
In the premolars and third molars the primitive H-pattern did form, as in Dikkomys.
The student will probably ask why the cheek teeth, which are all similar in appearance, are divided into premolars and molars.
Between the incisors and premolars of a dog come the characteristic biting teeth, or canines, absent in the rabbit.
The premolars are simple teeth; the molars distinctly bunodont with a tendency in one or two to the selenodont condition.
There are four premolars and two molars in each jaw on each side.
The premolars in the more ancient forms are unlike the molars, but like them in more recent forms.
While the molars have the selenodont character of other Pecora, the premolars are more adapted for cutting, with sharp edges.
There is the full Viverrine dentition, with five premolars in the upper jaw; but this may be an abnormality.
The canine teeth of existing species have disappeared; the incisors are, or are not, present; the molars and premolars are three and four in each half of each jaw.
The genus Proaelurus, Miocene in range, had four premolars in each jaw, and two molars in the lower and one in the upper.
If Chriacus is a Lemur it is an earlier type than those {553} which have been considered; for it has the typical Eutherian dentition of four premolars and three molars.
There are threepremolars and two molars on each side of each jaw.
The next stage is shown by Dinictis with three premolars in both jaws.
Lynx, which has only two premolars in each jaw and one molar.
The grinding teeth are of the tritubercular pattern; there are three of each kind in the upper jaw, but in the lower jaw only two premolars on each side.
Crossarchus differs from the last in only having three premolars on each side of each jaw.
The upper premolars are as complex as the molars, and there are no canines; in some species incisors also are absent.
The upper incisors, canines and first premolars of the Camel are very small teeth, and the first premolar is separated by a long diastema from the others.
The incisors are always fewer than 3/3; while the cheek teeth generally consist of four premolars and one molar, all of very uniform character, being compressed with conical crowns, and never more than two roots.
There are three incisors, one canine and four premolars on each side of each jaw.
The incisors are represented by i, the canines by c, the premolars by p or pm, and the molars by m.
The diastema in front of the premolars is longer in the living Equidae than in their extinct allies.
The premolar and molar teeth are usually dissimilar, the premolars being one-lobed and the molars two-lobed; the last lower molar of both the milk and permanent dentitions is almost always three-lobed.
The grinding teeth form a continuous series, the posterior premolars resembling the molars in complexity, and the last lower molar generally has no third lobe.
All fourpremolars in the upper jaw are preceded by milk teeth, while in Artiodactyla the first has no milk predecessors.
The premolars and molars have a very similar structure and form a continuous series of large square teeth with complex crowns.
There are four premolars and one molar, forming an uniform series of cheek teeth, all of which except in the Walrus have compressed and pointed, never flattened, crowns.
The number ofpremolars is always below the normal, often they are altogether wanting, but generally they are 1/1.
In the upper jaw there are six incisors of equal size--three on each side--two comparatively large canines of triangular shape and flattened from the sides, eight little premolars and six molars.
Three premolarsand three molars correspond with, and bite against, those of the upper jaw.
There are no teeth in the forepart of the upper jaw, the three premolars and three molars of each side being placed well back in the cheek.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "premolars" in a variety of sentences. We hope that you will now be able to make sentences using this word.
