680 EEPORT OF COMMISSIONER OF FISH AND FISHERIES. 



Mactra SOLiDissiMA Chemnitz. Plate XXVIII, fig. 202. (p. 358.) 



Couch., X, p. 350, Plate 170, fig. 1G56, 178S ; Gould, Invert., ed. i, p. 51 ; ed. ii, p. 

 73, fig. 387. Macira gigantea Lam.,4ui'"- sans Vert., ed. ii, vol. vi, p. 97. Mac- 

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

 Say, p. 101. Sjrlsula solidissima Gray, Charlesworth's Mag. Nat. Hisfc., vol. i, 

 p. 373, 1837 ; H. and A. Adams, vol. xi, p. 378. Hcminiactra solidisdma Conrad, 

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

 Hist., vol. xiii, p. 346,'1869. SjiisnJa Sayi Gray, op. cit.* p. 373. 



Florida aud 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 Fuudy, 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 (Eoemer). 



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

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

 (Conrad, as "J/. similisF-^). 



MuLiNiA lateralis Gray. Plate XXVI, fig. 18^, B. (p. 373.) 



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

 Lists, Miocene, p. 11, 1864. Mactra laleraJis 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. SlandcUa hitcrali!^ H. 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 Mexico to Galveston, Texas. Very abundant in Long Island 

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

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

 Xorth Carolina (Coues). Georgia (Conper). Texas (R(eraer). 



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

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

 in the Miocene of Virginia, Xorth and South Carolina. 



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



372.) 



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

 Couch., Part vl, 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. FctricoJa fornicata Say, Journ. Acad. Nat. Sci., Philadelphia, 

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

 fig. 2 (noil Sowerby, Hanley, etc.j ; 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, JMaine; and in the southern part of 

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

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

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

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



