188 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



187161, five valves (Coll. No. 708); Cat. No. 187162, four valves 

 (Coll. No. 709); Cat. No. 249834, one specimen (Coll. No. 1106); Cat. 

 No. 249835, one specimen and three valves (Coll. No. 1107) ; Cat. No. 

 250591, one specimen (Coll. No. 1464). 



Family MYTILIDAE. 



Genus MYTILUS Bolten. 

 MYTILUS MERIDIONALIS Krauss. 



Cat. No. 17960, U.S.N.M., one specimen from Natal. Cat. No. 

 17963, U.S.N.M., one specimen from South Africa. Cat. No. 98049, 

 U.S.N.M., one specimen from Albany. Cat. No. 250998, U.S.N.M., 

 contains two valves from Port Alfred (Coll. No. 1515). 



MYTILUS PERNA Linnaeus. 



The United States National Museum has four lots of this species, 

 all from Port Alfred, as follows: Cat. No. 186915, two specimens 

 (Coll. No. 285); Cat. No. 186916, one specimen (Coll. No. 286); 

 Cat. No. 250999, one valve (Coll. No. 1516); Cat. No. 249838, two 

 specimens (Coll. No. 1110). 



MYTILUS PERNA TRIGONIA Krauss. 



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

 States National Museum, all from Port Alfred, as follows: Cat. No. 

 187152, one valve (Coll. No. 699) ; Cat. No. 249837, two specimens 

 (Coll. No. 1109); Cat. No. 249842, two specimens (Coll. No. 1114). 



MYTILUS VARIABILIS Krauss. 



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

 States National Museum, all from the Cape of Good Hope, as follows: 

 Cat. No. 17973, one specimen; Cat. No. 43183, six specimens ; Cat. 

 No. 76032, two specimens; Cat. No. 125368, twenty-four specimens, 

 collected by the United States Eclipse Expedition; Cat. No. 250997, 

 U.S.N.M., one specimen from Port Alfred (Coll. No. 1514). 



MYTILUS VARIABILIS STRIATA Krauss. 



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



States National Museum, all from Port Alfred, as follows: Cat. 



No. 187153, four specimens (Coll. No. 700); Cat. No. 249839, two 



specimens (Coll. No. 1111); Cat. No. 249844, two specimens (Coll. 



No. 1116). 



Genus MODIOLA Lamarck. 



MODIOLA TENERRIMA Smith. 



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

 States National Museum, from Port Alfred, as follows: Cat. No. 

 186917, two specimens (Coll. No. 287); Cat. No. 249847, one valve 

 (Coll. No. 1119); Cat. No. 249846, two specimens (Coll. No. 1118). 



