262 U.S. NATIONAL MUSEUM BULLETIN 287 



ponciana Dall and Simpson, Drillia 1901, BUSFC, vol. 20, pt. 1, p. 



386, pi. 57, fig. 19 (Playa de Ponce, Porto Rico; USNM 159684). 

 pontonia, Leda 1890, PUSNM, vol. 12, no. 773, p. 257, pi. 13, fig. 5b 



(USFC stas. 2807, 2808, near Galapagos Islands). 

 popofianus^ Saxidomus 1904, HAE, vol. 4, p. 115, pi. 10, fig. 4 



(Miocene, N shore Popof Isalnd, Alaska); 1905, Schuchert, Dall 



et al, USNMB 53, pt. 1, p. 582 (USNM 164871). 

 popovia. Lorn 1919, PUSNM, vol. 56, no. 2288, p. 42, pi. 14, fig. 8 



(Bristol Bay, Bering Sea, to Monterey Bay, California; USNM 



220883). 

 poppei Dall and Bartsch, Odostomia (Egila) 1909, USNMB 68, p. 



170, pi. 19, fig. 3 (Point Abreojos, Lower California; USNM 



106519). 

 porcella, Corbula 1916, CSWM, p. 41, n.n.; 1916, PUSNM, vol. 52, 



no. 2183, p. 415 (ALBATROSS sta. 2838, off Lower California; 



USNM 97039). 

 porrecta 'Carpenter' Dall, Stectoplax 1882, PUSNM, vol. 4, no. 228, 



p. 288 (Japan). 

 porteri, OUvella iinazora 1910, N, vol. 23, no. 11, p. 133 (San Diego 



harbor [Californial and Scammon Lagoon, Lower California; 



USNM 209677). 

 porticus, Fiisinus 1915, N, vol. 29, no. 5, p. 56 (Panama; USNM 



76275). 

 portoricana, Codakia (Jagonia) 1901, PUSNM, vol. 23, no. 1237, 



pp. 800, 822, pi. 39, fig. 6 (San Juan harbor; Mayaguez harbor 



[Porto Ricol). 

 portoHcana Dall and Simpson, Rissoa 1901, BUSFC, vol. 20, pt. 1, 



p. 433, pi. 53, fig. 20 (USFC sta. 6062, Mayaguez Harbor, Porto 



Rico; USNM 159894). 

 portoricana Dall and Simpson, Turbonilla 1901, BUSFC, vol. 20, 



pt. 1, p. 414, pi. 53, fig. 15 (Mayaguez, Porto Rico; USNM 



160204). 

 portoricensis Dall and Simpson, Cocculina 1901, BUSFC, vol. 20, 



pt. 1, p. 440, pi. 53, figs. 18, 19 (USFC sta. 6052, San Juan 



harbor, Porto Rico; USNM 160496). 

 portoricensis Dall and Simpson, Niso 1901, BUSFC, vol. 20, pt. 1, p. 



414, pi. 57, fig. 4 (USFC sta. 6062, Mayaguez Harbor, Porto 



Rico; USNM 159693). 

 posti, Helicina 1915, USNMB 90, pp. 20, 113, pi. 5, fig. 7 (Tampa 



silex beds. Ballast Point, Tampa Bay, Florida; USNM 166093). 

 posti, Leda 1915, USNMB 90, pp. 21, 117, pi. 21, figs. 6, 9 (Tampa 



silex beds. Ballast Point, Tampa Bay, Florida; USNM 165171). 

 posti, Marginella 1915, USNMB 90, pp. 19, 56, pi. 12, fig. 6 (Tampa 



silex beds. Ballast Point, Tampa Bay, Florida; USNM 165057). 



