162 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



ing with the spiral sculpture. In addition to the spiral sculpture the 

 whorls are marked by fine, decidedly retractive lines of growth. 

 Sutures moderately constricted. Periphery of the last whorl strongly 

 angulated, marked by a cord about doubly as wide as those occurring 

 on the spire. Base very short, well rounded, slightly concaved at the 

 umbilical area, marked by 20 spiral cords which, on the posterior 

 half, are subequal and subequally spaced, while those on the anterior 

 half are alternately wider and narrower. The spaces between the 

 cords equal the cords in width. Aperture rhomboidal; outer lip thin, 

 showing the external sculpture within by transmitted light; ren- 

 dered feebly wavy by the external sculpture at the edge, which is 

 also true of the basal lip. The junction of the basal and outer lips 

 forms almost a right angle; columella very oblique, strongly curved 

 and partly reflected over the base as a smooth callus. 



The type, Cat. No. 97988, U.S.N.M., and three specimens of this 

 species come from Albany and Peddie, South Africa. The type has 

 six and one-half postnuclear whorls, and measures: Altitude, 20 mm.; 

 greater diameter, 20 mm. 



Some of the specimens in our collection are suffused with a purple 

 color. It seems remarkable that this large species should have been 

 overlooked so long. In our collection it has appeared under the names 

 of Calliostoma rufopunctata , ornata, and bicingulatum. 



Cat. No. 18711, U.S.N.M., contains three specimens from the Cape 

 of Good Hope. Cat. No. 186872, U.S.N.M., three specimens from 

 Port Alfred (Coll. No. 242). Cat. No. 187102, U.S.N.M., one speci- 

 men from Port Alfred (Coll. No. 646). Cat. No. 250516, U.S.N.M., 

 two young specimens from the same locality (Coll. No. 1389). 



CALLIOSTOMA AFRICANA, new species. 

 Plate 24, figs. 2, 4, 6. 



Shell regularly conic, flesh colored, with squarish maculations of 

 chestnut brown, the latter occupy a zone extending from the 

 periphery to the middle of the whorl, and are separated from each 

 other by a space about equal to the width of the brown spots. On 

 the base the spiral cords are dotted with maculations of the same 

 color. Nuclear whorls, at least two, apparently smooth. The post- 

 nuclear whorls are marked by spiral cords and axial riblets forming 

 tubercles at their junction, thus lending the spiral cords a granulated 

 appearance. Of these cords, 3 occur upon the first, 4 upon the sec- 

 ond, 7 upon the third, 8 upon the fourth, and 10 upon the penulti- 

 mate turn between the periphery and the summit. These spiral 

 cords are separated on all but the last whorl by spaces about equal 

 to the cords in width. On the last turn, however, the sulci are 

 broader and the tuberculated cords are less regular than on the pre- 

 ceding turns. Sutures slightly constricted. Periphery of the last 



