Their larvae have, for the purposes of respiration, some gills, othersretractile tubes.
The caterpillar possesses in the highest degree the retractilepower which has gained for certain species of this genus their popular names.
The head is seen in front resting on the foot and carrying a median non-retractile snout or rostrum, and a pair of cephalic tentacles at the base of each of which is an eye.
Most species have sharp, curved claws, often retractile between some of the lamellae or into a special sheath.
Notwithstanding the difference in the shells, the animals are very similar, having a retractile proboscis, and eyes immersed at the base of their tentacles.
The anus of the female is furnished with a tube of a corneous substance, consisting of four pieces, which, like the pieces of a telescope, are retractile within each other.
It resembles a cat in size and form, and has retractile claws.
Defn: A division of marine gastropods having a retractile proboscis and three longitudinal rows of teeth on the radula.
They have two pairs of retractile hooks, near the mouth.
Two anal organs in the larvae of Cerura Vinula, exerting from their apex a retractileflexible thread, with which they endeavour, by lashing their sides, to drive away the Ichneumons.
Fleshy exarticulate pediform often retractile organs, which assist various larvae in walking and other motions, but which disappear in the perfect insect.
When the last joint is very short, smaller than the preceding one, and retractile within it.
This organ seems analogous to that with four retractile fleshy horns, observed by Reaumur and De Geer in other species of Muscidae.
A bipartite retractile glutinous organ exerted from between the legs of the genus Sminthurus, and employed by the animal to support itself when its legs fail it[1123].
When it consists of several tubes retractile within each other like the pieces of a telescope.
Palpi pediform, the anterior pair thickest with a retractile sucker.
The external organ of the scent-secretors in Gyrinus consists of two minute hairy cylindrical retractile tubes, of a red colour[631].
A division of marine gastropods having a retractile proboscis and three longitudinal rows of teeth on the radula.
Climbing feet, or retractile claws as in the Cats, and perpendicular laminæ or plates under the soles, by means of which they cling to walls.
Proboscis having thick lips, and retractile into a large cephalic cavity; alulæ or halteral opercula arrested--Hypocera to Dolichocera.
The oral instruments of Pediculus and some other Aptera, in which the ordinary Trophi are replaced by an exarticulate retractile tube, which exerts a retractile siphuncle.
In the latter they are a mere retractile nipple-like protuberance, in some species so small as scarcely to be perceptible.
The tongue of some Hymenoptera also isretractile within the mouth.
Organs, consisting of two retractile pieces, issuing from the Mammulae, and rendering the threads[1149].
Two globose retractile vesicles issue from the ninth and tenth segments of those of Arctia chrysorrhea, &c.
Organs of generation those common to the Vertebrata, but retractile within the body, attended usually by various anal appendages, particularly a forceps in the males, and an ovipositor in the females.
These prolegs are fleshy, commonly conical or cylindrical, and sometimes retractile protuberances, usually attached by pairs to the underside of that part of the body that represents the abdomen of the future fly[295].
A conformation nearly similar takes place in the female of Tinea Lichenella; but in this the feet are longer, and the anus is furnished with a long retractile ovipositor[726].
The proper stings which inflict the wound: retractile within the sheath, externally serrulate at the apex[1136].
Aeluronyx of Madagascar and Seychelles has cat-like retractile claws.
The tongue is generally beset with more or less scaly or velvety papillae and has always a well-marked posterior margin, while the anterior portion may or may not be more or less retractile into the posterior part.
In the first place the claws are non-retractile, or at least less retractile than those of the true Cats.
The claws are not retractile, or at most semi-retractile as in the Panda.
Though living to a great extent upon the ground, it is also arboreal, and has sharp semi-retractile claws.
There are eight sessile, sub-triangular arms furnished with two series of suckers which are hemispherical and stalked, and two long retractile tentacular arms dilated at the extremities, bearing four rows of suckers.
There is a retractile proboscis, which suggests carnivorous habits.
There is a circlet, or rosette, of retractile plume-like gills, or branchiae, placed in the middle of the back posteriorly.
The animal has a well-developed foot, a retractile proboscis, eyes situated upon the tentacles, and a fairly long siphon.
The animal has a retractile proboscis and long, slender tentacles with eyes at the outer bases, and is a predaceous, [pg366] carnivorous creature.
The eyes, which open in the upper part of the head, are half projecting, and protected in part by a continuation of the soft, elastic, and retractile skin which covers the head.
In all these genera the foot is small, itsretractile muscles numerous, and the byssus large.
The retractile muscle is unequal, and nearly central.
The polyps, which are fleshy and white, are provided with eight long retractile tentacula, beautifully ciliated on their inner edge with two series of short processes strengthened with crystalline spicula.
Body long; limbs short, with non-retractile claws and naked soles.
The claws are large, strongly curved, compressed, very sharp, and exhibit the retractile condition in the highest degree.
The toes are straight, with long, unsheathed, non-retractile claws.
Feet subplantigrade, with five well-developed toes on each, carrying sharp, compressed, retractile claws.
It related to the use of a retractile spring to withdraw the armature lever from the magnet of a telegraph or other relay or sounder, and thus controlled the art of telegraphy, except in simple circuits.
The males have a retractile prong fixed by two ligaments to the abdomen, the female an oviduct which opens in vulva and spreads interiorly into a vast pouch, the resting place for the eggs.
It certainly in some degree resembles the cat externally, and it has also semi-retractile claws, but in greater measure it belongs to the Arctoidea.
Mantle with a fourth aperture; siphons long, quite separate, completelyretractile and invertible.
I cannot conclude this chapter without alluding to a few of the Carnivora with elongated snout and non-retractile claws, which inhabit the plains of Southern Asia and the great adjacent islands.
The Pleuroderes have the neck retractileon one side of the carapace, without their having the power of drawing it between their fore feet, and under the buckler and plastron, like the Cryptoderes.
The tongue is elongate, slender, terminating in a long fork, and is retractile into a sheath at its base.
The vermiform and retractile tongue is also a most singular organ.
Though they walk on their toes, like the members of the Felidae, or Cat family, their claws are neither sharp nor retractile like those of the Cat and they cannot serve either for attack or defence.
It has weak, non-retractile claws, which are unfitted for tearing purposes; but in its teeth it unmistakably shows its affinity to the Cat family.
The jaws were widely extended, so that the sharp retractile teeth were plainly visible, and the forked tongue at intervals was shot forward, and gleamed in the sun.
They lie in wait for their prey, capture it with their strong retractile teeth, and crushing it to death by constriction, swallow it whole--though often the animal swallowed is much larger than the diameter of their own bodies.
That this may be more perfectly accomplished, these arms are studded along their inner surface with rows of sucking discs, in each of which, by means of a retractile piston, a vacuum can be produced.
A short distance behind the head were two tremendous reddish-brown fins, with strong supporting spines that seemed to terminate in retractile claws.
The brownish fins were rigid as metal, the retractile claws unsheathed and cruelly curved.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "retractile" in a variety of sentences. We hope that you will now be able to make sentences using this word.
