SOUTH AFRICAN MARINE MOLLUSKS. 161 



rounded spiral cords on the first two postnuclear whorls and as broad 

 flattened cords on the last turn. Eight of these spiral cords appear 

 on the first, seven on the second, while on the last turn 12, including 

 the peripheral cord, appear between the periphery and the summit, 

 those nearest the periphery on this whorl being much narrower than 

 on the posterior portion of the whorl. Sutures well marked. Periph- 

 ery of the last whorl very strongly angulated. Base very short, 

 slightly concave, broadly, openly umbilicated, marked by 12 de- 

 pressed, rounded spiral cords of somewhat varying width. The entire 

 surface of the shell is marked by slender lines of growth which extend 

 over the base and into the umbilicus. Aperture very oblique, large; 

 outer lip thin, showing the external sculpture within ; inner lip almost 

 vertical, sinuous, reflected over and appressed to the preceding whorl. 

 The type and another specimen, Cat. No. 187111, U.S.N.M., come 

 from Port Alfred (Coll. No. 657). The type has three and one-half 

 postnuclear whorls, and measures: Altitude, 3.5 mm.; greater diameter, 



5 mm. 



Genus SOLARIELLA Wood. 



SOLARIELLA FUSCOMACULATA Smith. 



Cat. No. 187099, U.S.N.M., two specimens from Port Alfred (Coll. 

 No. 643). 



SOLARIELLA, species ? 



Cat. No. 187100, U.S.N.M., contains three specimens from Port 

 Alfred (Coll. No. 644), which belong to this genus, but which are too 

 worn to be properly identified. Cat. No. 250525, U.S.N.M., contains 

 two additional specimens of this species, but also too worn to serve 

 for diagnosis (Coll. No. 1398), from Port Alfred. 



Genus CALLIOSTOMA Swainson. 



CALLIOSTOMA EUCOSMIA, new species. 

 Plate 25, figs. 1, 2, 3. 



Shell broadly conic, of wax ground-color, variously mottled and 

 clouded with patches of white and brown; on the spire there is also a 

 narrow purple band which extends over the periphery and a little pos- 

 terior to it on the early whorls. On the base, particularly on the area 

 adjacent to the umbilical region, brown flakes alternating with flakes 

 of white, form a chain-like pattern. Nuclear whoils about one and 

 one-half, well rounded, smooth. Postnuclear whorls moderately 

 rounded, marked with subequal, and subequally spaced, granulose, 

 spiral cords, of which 4 occur upon the first, 5 upon the second, 7 upon 

 the third, 12 upon the fourth, and 23 upon the last whorl between the 

 sutures. These cords are about as wide as the spaces that separate 

 them. The tubercles on them are elongated, their long axes coincid- 



