1898.] NATURAL SCIENCES OF PHILADELPHIA. 57 



SYNOPSIS OF THE RECENT AND TERTIARY PSAMMOBIIDJE OF 



NORTH AMERICA. 



BY W. H. DALL. 



Family PSAMMOBIID^J. 



Genus PSAMMOBIA Lamarck. 



(—Psammobia (Lara., 1818) Bowdich, 1822; + Gari (pars) 

 Schumacher, 1817; -f- Haplomochlia Gistel, 1848 (fide Morch, 

 1852). Not Psammobia Cossman, 1886). 



Type P. (Tdlina) feromsis Gmelin, 1792, = T. gari Lin., 1762, 

 not of Lin., 1758. North European Seas. 



Section Psamniobia s. s. 



1. Psammobia (sp. indet.). 



880 fms. east of Tobago ; U. S. Fish Commission. A worn frag- 

 ment of undeterminable species. 



Section Grammatomya Dall, 1897. 



Wholly obliquely grooved, with no dorsal posterior area. 



2. Psammobia squamosa Lain. 

 Virgin Islands (Krebs). 



Subgenus GOBRiEUS Leach. 

 (— Solen Megerle, 1811, not Lin. 1758 ; -j- Psammobia Blainv., 

 1825, not (Lam., 1818) Bowdich, 1822 ; -f Sanguinolaria Blain- 

 ville, 1825, not Lamarck. 1799 ; + Azor Gray, 1851 (Brit. An., p. 

 51, not p. 62) ; -f- GobrcBUS (Leach MS.) Gray, 1852; -f Psammo- 

 cola sp., Blainv., 1825. Type Psammobia vespertina Lam. Eu- 

 ropean Seas. 



3. Gobraeus vaginatus Reeve. 

 Charlotte Harbor, Florida (?). 



4. Gobraeus circe Morch. 



Tortola and St. Thomas, West Indies. 



* * * 



5. Gobraeus maximus Deshayes. 

 Panama to the Gulf of California. 



6. Gobraeus regularis Carpenter. 

 Gulf of California. 



5 



