SOUTH AFRICAN MARINE MOLLUSKS. 181 



Gould's cotypes, Cat. No. 159, U.S.N.M., four specimens collected 

 by William Stimpson on the North Pacific Exploring Expedition at 

 False Bay, Cape of Good Hope. The specimen figured measures: 

 Length, 15.1 mm.; diameter, 2.5 mm. 



DENTALIUM EXASPERATUM Sowerby. 



Cat. No. 186910, U.S.N.M., three specimens from Port Alfred 

 (Coll. No. 280). Cat. No. 250592, U.S.N.M., six additional specimens 

 from Port Alfred (Coll. No. 1465). 



DENTALIUM REGULARE Smith. 



Cat. No. 187150, U.S.N.M., one specimen from Port Alfred (Coll. 

 No. 697). Cat. No. 250593, U.S.N.M., four specimens from the same 

 locality (Coll. No. 1466). 



DENTALIUM, species? 



Cat. No. 249795, U.S.N.M., contains two fragments of a Dentalium, 

 which we are unable to determine, from Port Alfred (Coll. No. 1067). 



Genus SCHIZODENTALIUM Sowerby. 



SCHIZODENTALIUM PLURIFISSURATUM Sowerby. 



Cat. No. 163019, U.S.N.M., one specimen, dredged in 100 fathoms 

 off Cape St. Blaize, South Africa. 



Class PELECYPODA. 



Order PRIONODBSMACKA. ' 



Family NUCULIDAE. 

 Genus NUCULA Lamarck. 



NUCULA SCULPTURATA Sowerby. 



Cat. No. 186966, U.S.N.M., two specimens from Port Alfred (Coll. 

 No. 338). 



NUCULA NUCLEUS Linnaeus. 



Cat. No. 249893, U.S.N.M., contains a very young specimen of a 

 Nucula, which appears to be of this species, from Port Alfred (Coll. 



No. 1165). 



Family LIMOPSIDAE. 



Genus LIMOPSIS Sasso. 



LIMOPSIS PUMILIS Smith. 



Cat. No. 186924, U.S.N.M., six valves from Port Alfred (Coll. No. 

 294). 



Family ARCIDAE. 



Genus GLYCIMERIS Da Costa. 



GLYCIMERIS QUEKETTI Sowerby. 



Cat. No. 186923, U.S.N.M., three valves from Port Alfred (Coll. No. 

 293). Cat. No. 251067a, U.S.N.M., contains a very young specimen 

 of this species (Col. No. 1584a). 

 80737°— Bull. 91—15 13 



