6l MOLI<USCA OF THE Gl^LF OF ?vIexiCO 29 



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

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

 at 1434, 17S0-1790, 1791-1S42, No. 3 ati700-i7i2 feet. 



Subgenus PSEUDAiVIUSIUM Adams 

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

 Distribution. — Fernandina to Cuba, Abj^ssal, 294 to 1181 fms. 

 Gulf of Mexico : western Fla. region. 



vitreum Gmelin 



Peden 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 Soo fms. 

 West Florida, deep water. 



Genus Ai^USSUlVl Bolten 

 papyraceum Gabb 



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



15, p. 257, 1873. 

 mortoniVi2X\, Bull. 37, U.S. Nat. Mus., p. 34, 1889. Not 



Peden 7?iortoni Ravenel 1 844. 

 papyrace2iinV)2L\\,Tra.ns. 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, 1917. 

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

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



mortoni Ravenel 



Peden mortoni Ravenel, Proc. Acad. Nat. Sci.' Phila., 2, p. 

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

 27, pi. 10, f. I, 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. "] a-c, '86; 

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



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

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



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



