. East coast marine shells : descriptions of shore mollusks together with many living below tide mark, from Maine to Texas inclusive, especially Florida, with more than one thousand drawings and photographs . Pandora trllineata, see p. 41 a series from Raritan Bay, New Jersey which was dredged around the year 1875. It prob- ably is extinct there now. The animal is very active and will leap to an astonishing height, in this re- spect exceeding the scallop (Pecten) shells. PI. 8, Fig. 4 Gulf of St. Lawrence to North Car- olina YOLDIA SAPOTILLA Gould. Pale yellowish green, translucent, thin, abou
. East coast marine shells : descriptions of shore mollusks together with many living below tide mark, from Maine to Texas inclusive, especially Florida, with more than one thousand drawings and photographs . Pandora trllineata, see p. 41 a series from Raritan Bay, New Jersey which was dredged around the year 1875. It prob- ably is extinct there now. The animal is very active and will leap to an astonishing height, in this re- spect exceeding the scallop (Pecten) shells. PI. 8, Fig. 4 Gulf of St. Lawrence to North Car- olina YOLDIA SAPOTILLA Gould. Pale yellowish green, translucent, thin, about sixteen teeth on each side. Range 4-100 fathoms. It lives chiefly off Cape Cod and may be obtained by dredging or in the stom- achs of fish. Length 23 mm. PI. 2, Fig. 5 Labrador to North Carolina. Family Arcidae Foot of animal deeply grooved. Shell with numerous comb-like teeth, arranged in a line following hinge margin and upon each valve. It is a very ancient family, there being many fossil species. GENUS ARCA Llnn6 1756 Shell elongated, strongly ribbed or cancellated; umbones separated by a lozenge-shaped area for the ligament. In India Area scaphxila lives in the Upper Ganges a thousand miles from the sea. The largest species lives at Panama. (Pacific.) ARCA AURICULATA Lamarck (A. deshayesil Hanley). Eared Ark. Shell with about twenty-seven strong rounded ribs which are crossed by concentric threads; oblong in shape. Inflated; high umbones separated by a narrow area; angle in front at hinge line; color whitish with a silky-brown epidermis. Length 65 mm.; height 45 mm.; diam. 45 mm. PI. 3, Fig. 8 Florida Keys and West Indies ARCA GAMPECHIENSIS Gmelin. Environment influences this species and its varieties to a very marked degree. It is largest and coarsest at Cape Cod. There is di- versity in the outline. The ribs on the left valve are often narrower, flatter and less conspicuous than upon the right. The typical form is the rounded southern one-. No very sharp line should b
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
