The strong corneous periostracum of a deep chestnut-color projects considerably beyond the margins of the valves; the shells are exceedingly thin and fragile, and are marked with radiating lines.
The corneous operculum upon its end, which is far too small to close the entrance of the shell when the creature retires within it, looks like a claw.
Corneous scales analogous to pax-wax, attached to the depressor muscles, like those of Geotrupes.
Now the larvæ of the fleas are completely similar in structure to those of the gnat-type, since they possess a corneous head with the typical mouth parts and antennæ and a 13-segmented body devoid of legs.
Horn, black; the upper part of the first segment with a corneous plate, similar to that of the Deilephila larvæ.
Caulis: the funicle of antenna: the corneous basal part of jaws.
Episternites: the upper pair of corneous appendages forming the ovipositor in grasshoppers.
This piece is often harder and more corneous than the terminal part, is linear, often longitudinally angular, and in the bee-tribes (Apis L.
A corneous piece which covers the instruments of suction above, representing the Labrum in a perfect mouth[956].
A corneous spot or plate, supposed to contain fluid, in the anterior margin of the upper wings; often produced by the conflux of the costal and postcostal nervures[1049].
The corneous or coriaceous part of the Hemelytrum[1025].
Two corneous scales observable in Lepidoptera, fixed on each side of the trunk, just behind the head, and covered with a long tuft of hair[1001].
Corneous tubes, for expanding the wing and keeping it tense, and to afford protection to the air-vessels--commonly called the Nerves.
A hexapod antenniferous larva of an oblong form, having like the former vestiges of a thorax, besides two or more articulated or inarticulated setaceous or corneous appendages to the last segment of the abdomen.
The corneous base of the Maxilla, below the Palpus[928].
A corneous case, with two grooves, in which the Terebella or Spicula play[1133].
The upper organs of flight, when they are corneous or coriaceous at the base and membranous at the apex[1024].
Two corneous plates which are laterally affixed to the mouth of a flea, probably representing the Mandibulae of the perfect mouth, which somewhat resemble the beak of a bird[964].
A hard, thickened, horny patch made up of the corneous layers of the epidermis.
It consists of hypertrophy of the corneous layer of the palm and soles, usually of a more or less horny and plate-like character, but is congenital or hereditary, and not necessarily dependent upon local friction or pressure.
On the general surface the fungus has its seat in the epidermis, especially in the corneous layer; upon the scalp and bearded region the epidermis, hair-shaft, root and follicle are invaded.
The silicious sponges with simple spicules appear to have existed as far back as the Siluro-Cambrian, and there is believed to be almost as early evidence of horny or corneous sponges.
There are still others that have their toes united and drawn under the skin, or enveloped in corneous hoofs, and are thereby enabled to exercise no prehensile power whatever.
In some, however, the feet end in a single corneous substance called a hoof.
Base of these wings in the male with a strong bristle passing behind a strong corneous retinaculum, which arises from the anterior side of the sub-costal nervure.
They are bones of great solidity, not invested with any corneous sheath, but clothed for a certain portion of their duration with a living vascular skin, and are shed every year during life and as constantly renewed.
At this season, the new matter deposited in the corneous sheath accumulates in the form of one of these bosses, each of which is therefore produced at the interval of a year.
Each cell arises from the upper and back part of another, with the intervention of a short corneoustube which is prolonged from the interior of one cell to that of the one above.
Some had great corneous stumps, seemingly torn off and bleeding.
I met old friends, not with new faces, but with their old faces oddly adorned in front, with each man a certain corneous excrescence.
