6 1 MOLIAJSCA OF THE GUEF OF MEXICO 29 



New Orleans pumping station No. 7; Knapp's wells, Ter- 

 rebonne Parish, No. 1 at 1600-1700, 2250-2450, No. 2 at 

 at 1434, 1 780- 1 790, 1791-1842, No. 3 ati7oo-i7i2 feet. 



Subgenus PSEUDAMUSIUM Adams 



strigillatum Dall, Bull. 37, U. S. Nat. Mus., p. 34, pi. 42, f. 2, '89. 

 Distribution. — Fernandina to Cuba, Abyssal, 294 to 1181 fms. 

 Gulf of Mexico : western Fla. region, 

 vitreum Gmelin 



Pecten vitreus Gmelin, Syst. Nat., 6, 1792 ; Dall, Bull. 37, 

 U. S. Nat. Mus., p. 34, pi. 64, fig. 141, 1889. 

 Distribution. — Arctic Ocean to Patagonia, 50 to 800 fms. 

 West Florida, deep water. 



Genus AMUSIUM Bolten 



papyraceum Gabb 



Pleuronectia papyracea Gabb, Trans. Amer. Phil. Soc, vol. 



15, p. 257, 1873. 

 mortoni Dall, Bull. 37, U.S. Nat. Mus., p. 34, 1889. Not 



Pecten mor toni Ravenel 1844. 

 papyraceum Dall, Trans. Wagner Inst. Sci., 3, pt. 4, pp. 718, 

 757, 1898, Idem, pt. 6, p. 1586, 1903 ; Maury, Bull. Amer. 

 Pal., No. 29, p. 190, pi. 26, fig. 22, 191 7. 

 Distribution. — Antilles and Gulf of Mexico. Miocene, Santo 

 Domingo. Living in deep and shallow water, west Florida, 

 mortoni Ravenel 



Pecten mortoni Ravenel, Proc. Acad. Nat. Sci. Phila., 2, p. 

 96, 1844 ; Tuomey and Holmes, Pleio. Foss. S. Car., p. 

 27, pi. 10, f. 1, 2, '55 ; Dall, Trans. Wagner Inst., 3, pt. 



4, P- 757, '98. 



Distribution. — Miocene : Md., Car. and Fla. Pliocene : Ca- 

 loosahatchie and Shell Creek, Fla. 

 dalli Smith, Chall. Rept. Lam., p. 308, pi. 22, fig. 7 a-c, '86; 

 Dall, B. M. C. Z., 12, p. 209, pi. 4, f. 1, '86 ; Bull. 37, U. 



5. Nat. Nus., p. 32, pi. 4, f. 1, pi. 40, f. 6, '89. 

 Distribution. — Bermuda to Barbados, abyssal, 218 to 1591 fms. 



Gulf of Mexico, western Fla. region, 860 fms. 



