92 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



The type and two specimens, Cat. No. 250363, U.S.N.M., come 

 from Port Alfred (Coll. No. 1236). The type has four postnuclear 

 whorls, and measures: Length, 1.5 mm.; diameter, 0.7 mm. 



ODOSTOMIA (ODOSTOMIA) ICAFRA, new species. 

 Plate 18, fig. 1. 



Shell small, quite regularly conic, semi translucent, bluish white. 

 Nuclear whorls obliquely immersed in the first of the succeeding turns, 

 above which the tilted edge of the last volution only projects. Post- 

 nuclear whorls slightly rounded, narrowly shouldered at the summit, 

 marked by exceedingly fine lines of growth. The posterior limit of the 

 interior of the whorl shines through the substance of the shell, and 

 causes the whorls to appear as if they had a double suture. Sutures 

 feebly impressed. Periphery of the last whorl well rounded. Base 

 slightly attenuated, well rounded, very narrowly uinbilicated, marked 

 by fine lines of growth only. Aperture Oval; posterior angle acute; 

 outer lip thin; inner lip strongly curved and reflected, provided with 

 a strong oblique fold at its insertion; parietal wall covered by a thin 

 callus. 



The type, Cat. No. 250366, U.S.N.M., comes from Port Alfred 

 (Coll. No. 1239). It has six postnuclear whorls, and measures: 

 Length, 2.4 mm.; diameter, 1.2 mm. 



Family ATLANTIDAE. 



Genus ATLANTA Lesueur. 

 ATLANTA PERONII Lesueur. 



One specimen, Cat. No. 250549, U.S.N.M., from Port Alfred (Coll. 

 No. 1422). Cat. No. 250551, U.S.N.M., contains two young speci- 

 mens from the same locality (Coll. No. 1424). 



Family CYMATIIDAE. 



Genus BURSA Bolten. 



BURSA (MARSUPINA), species? 



Cat. No. 186790, U.S.N.M., contains a specimen from Port Alfred 

 (Coll. No. 1 53) which resembles Bursa granifer of Lamarck, a Philip- 

 pine species. It is very likely the shell that has been reported from 

 South Africa under that name. Unfortunately the specimen before 

 me is not perfect enough to be properly diagnosed. Cat. No. 250439, 

 U.S.N.M., contains another young specimen from Port Alfred 

 (Coll. No. 1312.) 



BURSA (MARSUPINA), species? 



Cat. No. 187022, U.S.N.M., contains a specimen from Port Alfred 

 (Coll. No. 557) which resembles Bursa semigranosa from the Philip- 

 pines but is not that species. It is also too poor to permit of proper 

 diagnosis. 



