The whole outer surface of the cerebellum possesses a characteristic foliated or laminated appearance, due to its subdivision into multitudes of thin plates or lamellae by numerous fissures.
In the Coelotholida the frenula are often rather broad and irregularly fenestrated lamellae of silica (Pl.
Their structure is the same as that of the bars of the network; but the central axial canal and the surrounding concentric lamellae are usually more distinct than in the latter.
The thin wall of the shell is therefore double, composed of two parallel, very thin lamellae of silica, which are little distant from one another, and are connected by a network of small rods or septa.
In the lamellae of the antennae of the two specimens there is considerable difference, so that probably there may be a second species of Biphyllocera.
The ova are united together by a most delicate tunic investing each egg; the ovigerous lamellae being thus formed, as in the Lepadidae.
In Xenobalanus, the two ovigerouslamellae form two sub-cylindrical packets, pointed at their lower ends and often cohering.
Gill lamellae (not ctenidia, but special pallial growths, comparable with those of Pleurophyllidia).
Most species have sharp, curved claws, often retractile between some of the lamellae or into a special sheath.
This circlet of gill-lamellae led Cuvier to class the limpets as Cyclobranchiata, and, by erroneous identification of them with the series of metamerically repeated ctenidia of Chiton, to associate the latter mollusc with the former.
These gills are in the form of delicate lamellae (fig.
Patella bringing blood from the gill-series to the heart is seen; where it crosses the series of lamellae there is a short interval devoid of lamellae.
The arrangement of the lamellae and pads differs much in the various genera and is used for classificatory purposes.
Glandular lamellae of the inner face of the mantle-skirt.
The gill-lamellae of Patella are processes of the mantle comparable with the plait-like folds often observed on the roof of the branchial chamber in other Gastropoda (e.
The order of Asterospondyli comprises the typical sharks, those in which the individual vertebrae are well developed, the calcareous lamellae arranged so as to radiate, star-fashion, from the central axis.
The sharks and rays having no anal fin and with the calcareous lamellaearranged in one or more rings around a central axis constitute a natural group to which, following Woodward, we may apply the name of Tectospondyli.
In this group the vertebrae have the calcareous lamellae arranged in a single ring about the central axis.
This is divided with a wedge into smaller pieces of about a dozen lamellae each, and subsequently each lamella is slit off with the wedge and freed from gum and oil.
The bone from each side is brought on board generally in one piece, sufficient gum being taken with it to hold the lamellae together.
Their eyes are large and full, and their external ears erect, with shelf-like lamellae inside.
The precipice was perpendicular as a wall, its topmost height crowned with the same conglomerate of crystallized lamellae that had all along been so pronounced a feature.
The margins of thelamellae of the scorpion's lung-book, which are lowermost in the figures (fig.
Mesosomatic segments furnished with large plate-like appendages, the 1st pair acting as the genital operculum, the remaining pairs being provided with branchial lamellae fitted for breathing oxygen dissolved in water.
That is necessarily a blood-holding structure and is obliterated and fused with soft tissues of the sternal region so that the lamellae cannot be detached and presented as standing out from it.
It is probable that the Silurian scorpion was an aquatic animal, and that its respiratory lamellae were still projecting from the surface of the body to serve as branchiae.
Some cloudiness may be seen in the corneal lamellae adjacent to these fissures, in some cases due evidently to the filtration of aqueous humor through defective endothelium.
The just hatched larvae at once leave the egg lamellaeof their parent.
Additional gill lamellae attached to the two basal joints of the second and third abdominal appendages have appeared.
The first row of gill papillae formed becomes the innermost of the two lamellae of the adult.
The two rows give rise respectively to the two gill lamellaeof each side.
In most Primates the cervical vertebrae are very similar to those of man, but the inferior lamellae of the transverse processes are better developed.
In compact bone many of the lamellae are arranged concentrically round cavities, the =Haversian canals=, which in life are occupied by blood-vessels.
The transverse processes of the seventh vertebra have no inferior lamellae and are not perforated.
In ducks and geese the beak with the exception of the anterior end is soft, and its edges are raised into lamellae, while in the Mergansers these lamellae become pointed processes supported by bony outgrowths.
Each Haversian canal with its lamellae forms a =Haversian system=.
I wish only to show that this is not incredible, and that the immense plates of baleen in the Greenland whale might have been developed from such lamellae by finely graduated steps, each of service to its possessor.
In this latter species the lamellae are much coarser than in the shoveller, and are firmly attached to the sides of the mandible; they are only about fifty in number on each side, and do not project at all beneath the margin.
With such structures as the above lamellae of horn or whalebone, habit or use can have done little or nothing, as far as we can judge, towards their development.
There are other species of geese, as I hear from Mr. Bartlett, in which the lamellae are less developed than in the common goose.
On the other hand, the extremities of these lower lamellae are frayed into fine bristly points, so that they thus curiously resemble the plates of baleen.
In this latter bird the lamellae of the upper mandible are much coarser than in the common duck, almost confluent, about twenty-seven in number on each side, and terminating upward in teeth-like knobs.
In the family of the ducks, the lamellae are first used as teeth, then partly as teeth and partly as a sifting apparatus, and at last almost exclusively for this latter purpose.
The lower mandible of the shoveller-duck is furnished with lamellae of equal length with these above, but finer; and in being thus furnished it differs conspicuously from the lower jaw of a whale, which is destitute of baleen.
There are other species, as I hear from Mr. Salvin, in which the lamellae are considerably less developed than in the common duck; but I do not know whether they use their beaks for sifting the water.
Commonly between the embracing spiral turnings or convolutions a great number of radial beams is developed, irregularly disposed and often branching; they support the {691}thin spiral lamellae and give to the whole shell more solidity.
Patagium complete, envelops the whole shell, and is composed of two parallel lattice-lamellae on each side of the flat disk, which are connected by very fine perpendicular bars.
Spines at the central base with a cross of four prominent leaves; the meeting edges of the neighbouring lamellae so rest one upon another that twenty-two hollow pyramidal compartments are formed (compare p.
Round the canals of the middle layer, the bony lamellae are disposed concentrically, to a greater or less extent.
The mechanical result of the concrescence of the outer lamellae to the mantle-flap, and of the inner lamellae to one another as shown in section D, fig.
Diagrams of Transverse Sections of a Lamellibranch to show the Adhesion, by Concrescence, of the Gill-Lamellae to the Mantle-flaps, to the foot and to one another.
In this region the inner lamellae of the inner gill-plates are no longer affixed to the foot.
On the left side these lamellae are represented as having only a small reflected growth, on the right side the reflected ramus or lamella is complete (fr and er).
The concrescence, then, of the free edge of the reflected lamellae of the gill-plates of Anodon is very extensive.
In Anodonta the eggs pass into the space between the two lamellae of the outer gill-plate, and are there fertilized, and advance whilst still in this position to the glochidium phase of development (fig.
In the lateral view of the animal with reflected mantle-skirt and gill-plates, the line of concrescence of the inner lamellae of the inner gill-plates is readily seen; it is marked aa in fig.
After the formation and expulsion of a large concretion, new lamellae must be developed in some manner.
A very small concretion was removed from between two of the lamellae within an anterior gland.
These lamellae are coated with a pulpy cellular layer, with the outer cells lying free in infinite numbers.
Outline sketches showing characteristics of the lamellae or gills of mushrooms.
The variety semi-sanguinea has the lamellae red, almost as in the preceding species.
Ovary (in ours) 1-celled, with 2 parietal intruded placentae expanded into 2 broad lamellae or united into a central columella.
Ovules and seeds numerous on each placenta; corolla rotate-campanulate, with 10 vertical lamellae within.
Atrypa the broad spirally coiledlamellae are vertical, and directed toward the centre of the dorsal valve.
The lamellae or plates of this tortoise are 13 in number, and may be readily separated from the bony part by placing fire beneath the shell, whereby they start asunder.
The lamellae (reed of the coal) are always parallel to the bed or plane on which the coal rests; a fact which holds generally with this substance.
Olfactory lamellae upon the inner inferior lobe (in the female).
It is represented by three groups of lamellae (d), which are not fully exposed in the drawing.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "lamellae" in a variety of sentences. We hope that you will now be able to make sentences using this word.
