60 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



TROPHON INSIGNIS Sowerby. 



Cat. No. 186777, U.S.N.M., three specimens from Port Alfred (Coll. 



No. 138). 



TROPHON, species? 



Cat. No. 250464, U.S.N.M., contains the very tip of a Trophon, 

 from Port Alfred, too young to be identified (Coll. No. 1337). 



TRAPHON, species? 



Cat. No. 250467, U.S.N.M., contains the tip of another species of 

 Trophon, from Port Alfred, too young to be identified (Coll. No. 1340). 



Genus TRITONALIA Fleming. 



TRITONALIA CRAWFORDI Sowerby. 



Cat. No. 109601, U.S.N.M., six specimens from Cape of Good Hope. 



Cat. No. 186776, U.S.N.M., three from Port Alfred (Coll. No. 137). 



Cat. No. 43083, U.S.N.M., nine specimens from Cape of Good Hope. 

 Cat. No. 98041, U.S.N.M., 28 from Albany. Cat. No. 16884, U.S.N.M., 

 five from Cape of Good Hope. Cat. No. 186773, U.S.N.M., three 

 from Port Alfred (Coll. No. 134). 



TRITONALIA PURPUROIDES Dunker. 



Cat. No. 272129, U.S.N.M., four specimens from the Cape of Good 

 Hope. 



TRITONALIA KIENERI Reeve. 



Cat. No. 98044, U.S.N.M., four specimens from Albany. Cat. No. 

 186775, U.S.N.M., three from Port Alfred (Coll. No. 136). 



TRITONALIA BABINGTONI Sowerby. 



Cat. No. 186774, U.S.N.M., three specimens from Port Alfred (Coll. 

 No. 135). 



Cat. No. 227767, U.S.N.M., six specimens from the same locality 

 (Coll. No. 862), and Cat. No. 227768, U.S.N. M., four specimens from 

 the same source (Coll. No. 863). 



Genus SISTRUM Montfort. 



SISTRUM ALFREDENSIS, new species. 



Shell elongate-ovate, pale chestnut brown, washed with a greenish 

 suffusion, interior pale brown. Nuclear whorls decollated. Post- 

 nuclear whorls with a prominent shoulder in the middle between the 

 sutures, ornamented with strong coarse ribs, which become dimin- 

 ished in size from the shoulders posteriorly and anteriorly. Of these 

 ribs 12 occur upon the second and 10 upon the remaining turns. The 

 spaces between the ribs are about two-thirds as wide as the ribs. In 

 addition to this the entire surface is covered by coarse lines of 

 growth. The spiral sculpture consists of six feebly developed slender 

 threads between the summit and the shoulder, and three strong cords 

 between the shoulder and the suture, the first of these three cords 

 being on the posterior portion of the shoulder. A slender spiral 



