[073] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 379 



CLIDIOPHOKA TRILINEATA Carpenter. Plate XXVII, fig. 193. (p. 418.) 



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

 dora irllineata 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 5 Buzzard s Bay; Vineyard Sound; Casco 

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

 Harbor, New Jersey, 1 fathom. Beaufort, North Carolina (Coues, Yar 

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

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

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



PERIPLOMA PAPYRACEA Yerrill. Plate XXVII, fig. 197. (p. 509.) 



Ainer. Journal 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. Anatin a papyracea 

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

 Totten (name provisional), Amer. Jonr. Science, 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): Newport, Rhode Island (Totten); Greenport, Long 

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



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

 myopsis Beck = T. Couthouyi Stimpsou (see Plate XXVII, fig. 196), but 

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

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

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



COCIILODESMA LEANU3I Couthouy. Plate XXVII, fig. 198. (p. 418.) 



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. Anatina 

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



North 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 Nova Scotia (Willis) ; 

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

 C. antiqiiatum (Per-iploma antiquata Conrad), occurs in the Miocene of 



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 decUvis 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) ; Nahant, Massachusetts (Haskell) ; Ehode Island 

 26 v 



