680 EEPORT OF COMMISSIONER OF FISH AND FISHERIES. 



Maotra SOLIDISSIMA Gliemuitz. Plate XXYIII, 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. Mactra gigaiitea Lam., Auiiu. saus Vert., ed. ii, vol. vi, p. 97. Mac- 

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

 Say, p. 101. Spisula solidissbna Gray, Cliarlesworth's Mag. Nat. Hist., vol. i, 

 p. 373, 1837 ; H. and A. Adams, vol. xi, x>. 378. Hemimactra solidissima Conrad, 

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

 Hist., A^ol. xiii, p. 346, 1869. Sjnsula Sayi Gray, op. cit., T). 373. 



Florida and Gulf of Mexico to Labrador. Yery abuiidaut on the 

 outer beacli at Great Egg Harbor, New Jersey j XiOng Island; Long 

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

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

 Korth Carolina (Coues); Labrador (Packard); St. George's Bank (S. 

 I. Smith) ; West Florida (Jewctt),; Texas (Rcjemer). 



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

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

 (Conrad, as ''iff. similis f^^). 



MULINIA LATERALIS Gray. Plate XXVI, fig. 185, B. (p. 373.) 



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

 Lists, Miocene, p. 11, 1884. Mactra lateralis Say, Journ. Acad. Nat. Sci., Philad., 

 vol. ii, p. 309,1822; Gould, Invert., ed. i, p. 54, figs. 34, 3.5; ed. ii, p. 77, fig. 

 389. Standella lateralis 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 Yineyard Sound, 1 to 15 fath- 

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

 l^orth Carolina (Coues). Georgia (Couper). Texas (Roemer). 



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

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

 in the Miocene of Virginia, North and South Carolina. 



Petricola pholadiformis Lamarck. Phite XXVII, fig. 191). (p. 



372.) 



Anim. sans Vert., ed. i, vol. v.. p. 505, 1818; ed. ii, vol. vi, x)- 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 ; Gonld, Invert., ed. i,.p. 63 ; ed. ii, p. 

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

 vol. ii, p. 319, 1822. Petricola dactylm Say, Amor. Conch., Part vi, Plato 60, 

 fig. 2 {uon Sowerhy, Ilanley, etc,}; Gould, Invert., ed. i, p. 65 ; ed. ii,p. 92^ 

 fig. 41. 



Florida and (Julf 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 LaAvrence, 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 ]iay (Chelsea, Xahanr, etc.). Fort INlacon (Coues) ; 



