SOUTH AFRICAN MARINE MOLLUSKS. 183 



BARBATIA CAFRIA, new species. 

 Plate 38, figs. 1, 5. 



Shell small, rather gibbous, the umbones salmon colored, the rest 

 yellowish white. The epidermis, when present, dark chocolate 

 brown. The two valves similarly sculptured, the epidermis forming 

 strong setae on every third radiating riblet, while the two inter- 

 mediate ones seem simply to be covered with a smooth integument. 

 There are 29 of the setaceous ribs on each valve and double that 

 number of the intermediary ones. The riblets bearing the setae are 

 strongly nodulose, while the others are almost smooth. Liganiental 

 area narrow, marked by transverse grooves. Interior white. 



The type and another specimen of this species, Cat. No. 249849, 

 U.S.N.M., come from Port Alfred (Coll. No. 1121). The type meas- 

 ures: Altitude, 8.5 mm.; length, 14.2 mm.; diameter, 8.6 mm. 



Cat. No. 187156, U.S.N.M., contains four additional valves from 

 the same place (Coll. No. 703). 



Family PINNIDAE. 

 Genus PINNA Lamarck. 



PINNA SQUAMIFERA Sowerby. 



Cat. No. 187159, U.S.N.M., two specimens from Port Alfred (Coll. 

 No. 706). Cat. No. 227814, U.S.N.M., contains two additional 

 specimens from the same locality (Coll. No. 909). 



Genus ATRINA Gray. 



ATRINA ALFREDENSIS, new species. 

 Plate 40, fig. 3. 



Shell depressed pyriform; hom colored, darker at the tip. The in- 

 terior is dull horn colored, excepting the tip, which is smoky pearly. 

 Upper side slightly curved ; the ventral edge decidedly concave ; pos- 

 terior portion decidedly expanded. The surface is marked with five 

 poorly developed and poorly expressed radiating ridges beset with 

 decidedly elevated squamations, which are strongest on the three 

 median ridges. The ventral border is rendered rasp-like by fine 

 poorly developed squamations. 



The type and another specimen, Cat. No. 227815, U.S.N.M., come 

 from Port Alfred (Coll. No. 910). The type measures: Length, 73 

 mm.; greater diameter, 50 mm. 



ATRINA AFRA Sowerby (?). 



Cat. No. 187160, U.S.N.M., contains fragments of probably this 

 species from Port Alfred (Coll. No. 707). Cat. No. 250991, U.S.N.M., 

 contains another fragment of this species, from the same locality 

 (CoU. No. 1508). 



