680 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



Maotra solidissima Chemnitz. Plate XXVIII, fig. 202. (p. 358.) 



Conch., x, p. 350, Plate 170, fig. 1656. 1788 ; Gould, Invert., ed. i, p. 51 ; ed. ii, p. 

 73, fig. 387. Maotra gigantea Lain., Anim. sans Vert., ed. ii, vol. vi, p. 97. Mac- 

 tra similis Say, Journ. Acad. Nat. Sci., Philadelphia, vol. ii, p. 309, 1822; Binney's 

 Say, p. 101. Spisula solidissima Gray, Charlesworth's Mag. Nat. Hist., vol. i, 

 p. 373, 1837 ; H. and A. Adams, vol. si, p. 378. Hcmimactra solidissima Conrad, 

 Amer. Journ. Conch., vol. iii, appendix, p. 32 ; Perkins, Proc. Bost. Soc. Nat. 

 Hist., vol. xiii, p. 346, 1869. Spisula Sayi Gray, op. cit., p. 373. 



Florida and Gulf of Mexico to Labrador. Very abundant on the 

 outer beach at Great Egg Harbor, New Jersey; Long Island; Long 

 Island Sound; Vineyard Sound ; Cape Cod; Massachusetts Bay; Casco 

 Bay; Bay of Fundy, low water-mark to 10 fathoms, sandy. Fort Macon, 

 North Carolina (Cones); Labrador (Packard); St. George's Bank (S. 

 I. Smith) ; West Florida (Jewett) ; Texas (Rcemer). 



Fossil in the Post-Pliocene at Point Shirley, Chelsea, Massachusetts 

 (Stimpson) ; and apparently in the Miocene of North and South Carolina 

 [(Conrad, as " M. similis f"). 



Mulinia lateralis Gray. Plate XXVI, fig. 185, B. (p. 373.) 



Charles worth's Mag. of Nat. Hist., vol. i, p. 376, 1837 ; Meek, Smithsonian Check- 

 Lists, Miocene, p. 11, 1864. Mactra lateralis Say, Journ. Acad. Nat. Sci., Philad., 

 vol. ii, p. 309,1822; Gould, Invert., ed. i, p. 54, figs. 34, 35; ed. ii, p. 77, fig. 

 389. Standella lateralis II. and A. Adams, Genera, vol. ii, p. 382, 1858 ; Conrad, 

 Proc. Philad. Acad., vol. xiv, p. 573, 1862. 



Massachusetts Bay to Florida, and on the northern shores of the 

 Gulf of Mexipo to Galveston, Texas. Very' abundant in Long Island 

 Sound; common in Buzzard's Bay and Vineyard Souud, 1 to 15 fath- 

 oms, mud. Boston and near Lynn, Massachusetts (Gould). Fort Macon, 

 North Carolina (Coues). Georgia (Couper). Texas (Rcemer). 



Fossil in the Post-Pliocene of Virginia, North Carolina, South Carolina? 

 and Florida (Saint John's River) ; in the Pliocene of South Carolina ; and 

 fin the Miocene of Virginia, North and South Carolina. 



Petricola pholadiformis Lamarck. Plate XXVII, fig. 199. (p. 



372.) 



Anim. sans Vert., ed. i, vol. v.. p. 505, 1818; ed. ii, vol. vi, p. 159; Say, Amer. 

 Conch., Part vi, Plate 60, fig. 1, 1834 ; Binney's Say, p. 222 (same plate) ; Han- 

 ley, Recent Shells, p. 52, Plate 13, fig. 49 ; Gould, Invert., ed. i, p. 63 ; ed. ii, p. 

 90, figs. 398, 399. Petricola fornicata Say, Journ. Acad. Nat. Sci., Philadelphia, 

 vol. ii, p. 319, 1822. Petricola dactylus Say, Amer. Conch., Part vi, Plate 60, 

 fig. 2 (non Sowerby, Hanley, etc.); Gould, Invert., ed. i, p. 65; ed. ii, p. 92 

 fig. 41. 



Florida and Gulf of Mexico to Massachusetts Bay ; local and more 

 rare farther north, at Quahog Bay, Maine ; and in the southern part of 

 the Gulf of Saint Lawrence, as at Prince Edward's Island (Dawson) ; 

 Nova Scotia (Willis). Very common in Long Island Sound, near New 

 Haven; Buzzard's Bay; Vineyard Sound (Lackey's Bay, etc.); and 

 Massachusetts Bay (Chelsea, Nahant, etc.). Fort Macon (Coues) ; 



