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Acad angle angular animal aperture aperture ovate apex base beaks body whorl Bost breadth Brit callus Cape Cod Catal Chemn Chiton Coll color columella compressed concave Conch Conchology conspicuous convex Couthouy Crustacea curved deep diameter divergence edge elevated elongated Encyc epidermis Figure flattened folds Fusus gaping Genus grooved height Helix hinge margin Hist horn-color inch inequilateral inner lip interior Journ JVat Lamarck length ligament lines of growth lower whorl marked Martha's Vineyard Montagu narrow nearly numerous oblique obtuse operculum operculum horny oval palleal pillar Planorbis posterior posteriorly prominent Provincetown Rackett radiating lines regularly revolving lines ribs ridges rounded Scalaria Shell small side slightly smooth Sowerby species specimens spire stomachs of fishes sub-oval surface suture Syst tentacula thick thickened thin tooth Totten transverse Turton umbilicus upper usually valve Vert whorls five whorls four wrinkled yellowish Zool
Página 316 - Of the 197 marine species, 83 do not pass to the south shore, and 50 are not found on the north shore of the Cape. The remaining 64 take a wider range, and are found on both sides.
Página 318 - But it is especially abundant about sandy shores, as at Cape Cod. At Provincetown I have seen them stranded upon the beach at low tide, in great multitudes. Their usual mode of swimming is by dilating their sacshaped body and filling it with water. The body is then suddenly contracted and the water forcibly ejected, so as to propel them backwards, with great rapidity. So swift and straight is their progress, that they look like arrows shooting through the water. Whenever they strike the shore, they...
Página 357 - ... Towards the southwest in the middle of this Bay" (ie, Back Bay, at mouth of Charles River) " is a great Oyster-banke "...." The Oyster-bankes " (referring to the same) " doe barre out the bigger ships." In the first edition (1841) of the " Invertebrata of Massachusetts," Dr. Gould says (p. 357) " old men relate that they were accustomed to go up Mystic River and Charles River, and gather oysters of great size, before it was the custom to bring them from New York. And even now individuals of enormous...
Página 227 - ... least the half of a revolution ; aperture circular, lip simple and sharp ; on looking at the shell from below, no umbilical opening is found; operculum horny, apex central, elements concentric. Length .1, breadth 3-40 inch. Found at Fresh Pond and other ponds, on stones and submerged sticks ; and has been for many years in our cabinets marked as a Paludina. Animal very active ; head proboscidiform, half as long as the tentacles, bilobed in front, dark, terminated with light ; tentacles rather...
Página 194 - Shell suboval, pale yellowish, diaphanous, very thin and fragile, with nearly three oblique volutions. Body very large. Spire small, but little prominent, somewhat obtuse. Aperture longitudinally subovate, large. Columella much narrowed, so as almost to permit the view of the interior apex from the base of the shell. Scarcely any calcareous deposit on the pillar lip.
Página 212 - Shell sinistral, subovated; color pale yellow, chestnut or blackish; whorls four, the first large, the others very small, terminating rather abruptly in an acute apex; aperture large, somewhat oval, threefourths of the length of the shell, or rather more; within of a pearly lustre, often blackish; lip a little thickened on the inside, and tinged with dull red.
Página 206 - ... three, the outer one rapidly increasing ; surface exhibiting traces of revolving lines when denuded, but usually covered with a dark pigment or epidermis, bristling with rigid hairs which are arranged in close revolving lines ; lines of growth very faint ; aperture sub-oval, oblique, its diameter from side to side shorter than in the opposite direction ; its plane very oblique. Long diameter one-fifth inch, short diameter one-fifteenth inch.
Página 213 - Shell heterostrophe, subglobose, pale yellowish; whorls rather more than four, very rapidly attenuated; spire truncated, hardly elevated beyond the general curve of the surface; suture not impressed; aperture but little shorter than the shell, dilated; labrum a little thickened on the inner margin. Length more than one-half of an inch.
Página 206 - Shell light yellowish-brown, concave on both sides, most so on the left : whirls three ; surface beset with revolving lines of rigid hairs ; aper- Fig- 220. ture large, very oblique. State Coll. No. 82, Soc. Cab. No. 1278. Shell small, somewhat transparent, of a brownish-yellow color ; both sides concave, the left rather more than the right, but the concavity is there more limited by the presence of a sub-angular ridge on the outer whirl ; whirls three, the outer one rapidly increasing ; surface...
Página 216 - Silliman's journal, xxxiii. 196But as it has not been found in any other place, I am now disposed to regard it as a strongly marked local variety of L. columella. It is very possibly such a shell to which Mr. Say alludes in the " Journal of the Academy of Natural Sciences,