INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 673 



Clidiophora trilineata Carpenter. Plate XXYIT, fig. 193. (p. 418.) 



Proc. Zool. Soc, London, 1864, p. 597 ; Mollusks of W. N. America, p. 226. Pan- 

 dora trilineata Say, Journ. Acad. Nat. Sciences, Philadelphia, vol. ii, p. 261, 

 1822; Gould, Invert., ed. i, p. 44; ed. ii, p. 62, fig. 379. 



Florida to Gulf of Saint Lawrence. Common in Long Island Sound ; 

 off Block Island, 29 fathoms ; Buzzard's Bay; Vineyard Sound; Casco 

 Bay; and Bay of Fundy ; low water mark to 30 fathoms; Great Egg 

 Harbor, Xew Jersey, 1 fathom. Beaufort, Xortk Carolina (Cones, Yar- 

 row). Fossil in the Post-Pliocene of Virginia and South Carolina; and in 

 the Pliocene of South Carolina. A closely-related form, C. crassidens 

 (Conrad, sp.), occurs in the Miocene of Virginia. 



Periplo3IA papyracea Verrill. Plate XXVII, fig. 197. (p. 509.) 



Amer. Jourual Science, vol. iii, pp. 213, 285, Plate 7, figs. 1, l a , l b (animal and 

 hinge), 1872. Anatina papyratia Say, op. cit., p. 314, 1822. Anaiina papyracea 

 Gould, Invert., ed. i, p. 47, fig. 28; ed. ii, p. 66, fig. 382. Anaiina fragilis 

 Totten (name provisional), Amer. Jour. Scieuce, vol. xxviii, p. 347, fig. 1, 1835. 



New Jersey to Labrador. Anticosti Island (A. E. V.) ; not uncommon 

 in Massachusetts Bay, Casco Bay, and Bay of Fundy, 10 to 100 fath- 

 oms. Less frequent south of Cape Cod ; off Block Island, in 29 fathoms, 

 (A S. Packard); Xewport, Rhode Island (Totten); Greenport, Long 

 Island (S. Smith). Chateau Bay, Labrador (Packard). 



This species, when young, is liable to be confounded with Thracia 

 myolysis Beck = T. Coutlwuyi Stimpson (see Plate XXVII, fig. 19G), but 

 they are easily distinguished by the structure of the hinge. The latter 

 occurs in Massachusetts Bay, Bay of Fundy, etc., northward to Green- 

 laud, but has not been recorded from south of Cape Cod. 



Cochlodesma Leanum Couthouy. Plate XXVII, fig. 198. (p. 118.) 



Boston Jour. Nat. Hist., vol. ii, p. 170, 1839; Stimpson, Shells of New England, 

 p. 22; Gould, Invert., ed. i, p. 49, figs. 29, 30 ; ed. ii, p. 68, fig. 383. Anaiina 

 Leana Conrad, Jour. Acad. Nat. Sciences, vol. vi, p. 263, Plate 11, fig. 11, 1831. 



Xorth Carolina to the Gulf of Saint Lawrence. Vineyard Sound and 

 Long Island Sound, not uncommon in 3 to 10 fathoms; Casco Bay and 

 Eastport, Maine, rarely obtained alive; banks off Xova Scotia (Willis) ; 

 Saint George's Bank (S. I. Smith and O. Harger). A related species, 

 C. antiquatum (Periploma cmtiquata Conrad), occurs in the Miocene of 

 Virginia. 



Thracia Conradi Couthouy. (p. 426.) 



Boston Jour. Nat. Hist., vol. ii, p. 153, Plate 4, fig. 2, 1839; Gould, Invert, 

 ed. i, p. 50; ed. "ii, p. 69, fig. 384. Thracia declivis Conrad, Amer. Mar. Conch., 

 p. 44, Plate 9, fig. 2, 1831 (not of Pennant). 



Long Island to Gulf of Saint Lawrence. Vineyard Sound, 6 to 8 fath- 

 oms ; Casco Bay, 6 to 15 fathoms ; Frenchman's Bay, near Mount Des- 

 ert, Maine, 3 to 8 fathoms. Eastport, Maine, in 6 fathoms, and Grand 

 Menan (Stimpson) ; Xahant, Massachusetts (Haskell) ; Bhode Island 

 S. Mis. Gl -43 



