. East coast marine shells; descriptions of shore mollusks together with many living below tide mark, from Maine to Texas inclusive, especially Florida. Mollusks. 26 EAST COAST MARINE SHELLS Most of the species occur below low tide mark. GENUS NUCULANA Link 1807 (Leda Schumacher 1817) NDCDLANA ACUTA CONRAD. Pointed Nut. Shell inflated, oval, anterior end rounded and somewhat drawn out, ridged from umbones to anterior base; sculpture of well-defined ridges which are mostly concentric; inte- rior shining; color greenish olive. Length 9 mm. Depth range 2-225 fathoms. A variable little shell- It i
. East coast marine shells; descriptions of shore mollusks together with many living below tide mark, from Maine to Texas inclusive, especially Florida. Mollusks. 26 EAST COAST MARINE SHELLS Most of the species occur below low tide mark. GENUS NUCULANA Link 1807 (Leda Schumacher 1817) NDCDLANA ACUTA CONRAD. Pointed Nut. Shell inflated, oval, anterior end rounded and somewhat drawn out, ridged from umbones to anterior base; sculpture of well-defined ridges which are mostly concentric; inte- rior shining; color greenish olive. Length 9 mm. Depth range 2-225 fathoms. A variable little shell- It is quite common in a few feet of water off the Florida west coast. PI. 2, Fig. 2 Off Martha's Vineyard to West Indies GENDS YOLDIA Muller 1842; Portlandia, Morch 1853 Shell compressed, posterior end pointed; sculpture fine; covered with a varnish-like epidermis; slightly pearly in- side. YOLDIA LIMATULA Say. Shiny Yoldia. Very smooth and shining; umbones near center; twenty-two teeth on anterior, eighteen on pointed side. Length 48 mm. or less. A very beautiful shell, living in mod- erate depths. It once was plentiful in Boston harbor. The writer has 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, Fig. 30-. PI. 2, Fig. 4 Gulf of St. Lawrence to North Car- olina YOLDIA SAPOTILLA Gould. Pale yellowish green, translucent, thin, about rixteen teeth on each side. Range 4-100 fathoms. It lives chiefly off Cape Cod and. Fig. 50 loldia limatuJa 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 Linn6 1758 Shell elongated, st
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectmollusks
