from The Century Dictionary.
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from Wiktionary, Creative Commons Attribution/Share-Alike License.
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The horns of the male are sub-triangular, much compressed laterally and posteriorly; in fact one may say concave at the sides, that is, from the base of the horn to about one half; transversely sulcated; curving outwards, and returning inward towards the face; points convergent.
-- General colour brownish-grey, beneath paler; belly white; a short beard of stiffish brown hair; the horns of the male are sub-triangular, rather compressed laterally and rounded posteriorly, deeply sulcated, curving outward and backward from the skull; points divergent.
Hodgsonii_, but it differs in its much smaller size, in its deeply sulcated horns, the angles of which are very much rounded, and the terminal curve but slightly developed.
A deep sulcated cavity is formed by the thick and thin involuted parts of the bone.
They are flat on one side; the enamel extends to the root on both sides; it is more regularly sulcated upon the convex than upon the other side; fig. 55 young of the sulcidens.
They are, however, more deeply sulcated in concentric lines, drawn, as if by a pair of compasses, from the umbone, and somewhat resembling those of the genus
We, besides, found in them at least two species of Pecten, with two species of Terebratula, -- the one smooth, the other sulcated; a bivalve resembling a Donax; another bivalve, evidently a Gervillia, though apparently of a species not yet described; and the ill-preserved rings of large Ammonites, from ten inches to a foot in diameter.
There occurs in great numbers a species of small Pecten, -- some of the specimens scarce larger than a herring scale; a minute Ostrea, a sulcated Terebratula, an Isocardia, a Pullastra, and groups of broken serpulæ in vast abundance.
Both species bear the longitudinal groove in the centre, and when broken across, are found to contain numerous smaller shells, -- Terebratulæ of both the smooth and sulcated kinds, and a species of minute smooth Pecten resembling the _Pecten demissus_, but smaller.
I found detached on the shore, immediately below this bed, a piece of calcareous fissile sandstone, abounding in small sulcated