SOUTH AFRICAN MARINE MOLLUSKS. 187 



LIMA AFRICANA, new species. 

 Plate 38, fig. 4. 



Shell small, thin, inaequivalve, bluish white, gaping at the poste- 

 rior lateral border and at the middle of the ventral border. Hinge 

 line slightly sloping in both directions from the umbones. The 

 lateral margin is concave immediately below the junction of the hinge 

 line, then strongly curved toward the anterior border. The ventral 

 margin is also slightly concave immediately below the hinge line, 

 then almost straight, curving suddenly upon reaching the anterior 

 margin. The exterior sculpture consists of about fifty fine radiating 

 riblets. The posterior ventral and lateral borders are not ribbed. 

 Interior bluish white, showing the external riblets by transmitted 

 light. 



The type, Cat. No. 249853, U.S.N.M., comes from Port Alfred 

 (Coll. No. 1125). It measures: Length, 13.5 mm. ; diameter, 9 mm.; 

 thickness, 5 mm. 



This is evidently the shell which has been listed as Lima Mans 

 tenera Turton. It is not that species however. The sculpture is 

 much finer and less regularly fluted than in tenera, and the shell is 

 much shorter and more rounded than tenera, the latter being elongate. 



LIMA, species? 



Cat. No. 251002, U.S.N.M., contains a very young Lima, from 

 Port Alfred, which I am unable to identify (Coll. No. 1519). Cat. 

 No. 250376, U.S.N.M., contains another very young Lima from Port 

 Alfred, in the same state (Coll. No. 1249). 



Family ANOMIIDAE. 



Genus ANOMIA Muller. 

 ANOMIA EPHIPPIUM Linnaeus. 



Cat. No. 136, U.S.N.M., contains a young specimen collected by 

 William Stimpson on the North Pacific Exploring Expedition at 

 Simons Bay. In addition to this, there are six lots of young speci- 

 mens in the collection of the United States National Museum, all 

 from Port Alfred, as follows: Cat. No. 187162, three valves (Coll. 

 No. 709); Cat. No. 249836, three valves (Coll. No. 1108); Cat. No. 

 250988, four valves (Coll. No. 1505); Cat. No. 250993, one valve 

 (Coll.. No. 1510); Cat. No. 250531, one valve (Coll. No. 1404); Cat. 

 No. 251060, one valve (Coll. No. 1577). 



ANOMIA PATELLIFORMIS Linnaeus. 



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

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



