SOUTH AFRICAN MARINE MOLLUSKS. 117 



CERITHIUM CRASSILABRUM Krauss. 



Cat. No. 249689, U.S.N" .M., contains a specimen from Port Alfred 

 (Coll. No. 961). 



CERITHIUM (POTAMIDES) DECOLLATA Linnaeus. 



Cat. No. 18603, U.S.N.M., one specimen from Natal. Cat. No. 

 272132 U.S.N.M., four from Port Elizabeth. 



Family PLANAXIDAE. 

 Genus PLANAXIS Lamarck. 



PLANAXIS PYRAMIDALIS Deshayes. 



Cat. No. 21804, U.S.N.M., one specimen collected by Dunker at 

 Algoa Bay. 



Family CAECIDAE. 



Genus CAECUM Fleming. 



CAECUM GLABRATUM Montagu. 



Cat. No. 227809, U.S.N.M., four specimens from Port Alfred (Coll. 

 No. 904). Cat. No. 249793, U.S.N.M., one specimen from the same 

 locality (Coll. No. 1065). 



Family VERMETIDAE. 



Genus VERMICULARIA Lamarck. 



VERMICULARIA, species ? 



Cat. No. 187125, U.S.N.M., four worn specimens from Port Alfred 

 (Coll. No. 671). Cat. No. 250540, U.S.N.M., contains three addi- 

 tional specimens from the same locality (Coll. No. 1413). 



VERMICULARIA, species? 



Cat. No. 187120, U.S.N.M., four specimens of another species of 

 Vermiculana, too fragmentary to be positively identified, from Port 

 Alfred (Coll. No. 666). Cat. No. 227787, U.S.N.M., three specimens 

 from the same locality (Coll. No. 882). 



There are three lots of this species in the collection of the United 

 States National Museum all from Port Alfred. Cat. No. 187124, four 

 specimens (Coll. No. 670). Cat. No. 187127, one specimen (Coll. No. 

 673). Cat. No. 250541, three specimens (Coll. No. 1414). 



Cat. No. 187122, U.S.N.M., two specimens of a fourth species from 

 Port Alfred (Coll. No. 668) likewise too poor to be specifically deter- 

 mined. Cat. No. 250539, U.S.N.M., contains two additional speci- 

 mens from Port Alfred (Coll. No. 1412). 



Genus SILIQUARIA Bruguiere. 



SILIQUARIA (PYXIPOMA) WELDI Tenison-Woods. 



Cat. No. 187119, U.S.N.M., four specimens from Port Alfred (Coll. 

 No. 665). 



80737°— Bull. 91—15 9 



