SOUTH AFRICAN MARINE MOLLUSKS. 63 



EPITONIUM TENEBROSUM Sowerby. 



Cat No 186836 U.S.N.M., contains two specimens of this species, 

 from Port Alfred (Coll. No. 203). Cat. No. 249716, U.S.N.M., 

 contains two additional specimens from the same locality. (Coll. 



No. 988). 



EPITONIUM DURBANENSE Smith. 



Cat. No. 186838, U.S.N.M., two specimens from Port Alfred (Coll. 

 No. 205). 



EPITONIUM LACTEUM Krauss. 



Cat. No. 145, U.S.N.M., one specimen collected by William Stimp- 

 son on the North Pacific Exploring Expedition, at False Bay, Cape 

 of Good Hope, Cat. No. 186839, U.S.N.M., three specimens from 

 Port Alfred (Coll. No. 206). 



EPITONIUM AGLAIA, new species. 

 Plate 17, fig. 4. 



Shell elongate-conic, white. (Nuclear whorls decollated.) Post- 

 nuclear whorls well rounded; marked by numerous, very retractive 

 axial ribs which are about one-half as wide as the spaces that sepa- 

 rate them, and an occasional varix. The latter are irregularly dis- 

 tributed Of the axial ribs, 28 occur upon the first and second of the 

 remaining whorls, 30 upon the third, 36 upon the fourth, 40 upon the 

 fifth, and 42 upon the penultimate turn. In addition to the axial 

 ribs ' the whorls are marked by numerous spiral striations, which are 

 more closely crowded at the summit than on the rest of the whorl. 

 About 34 of these lirations occur between the sutures on the penulti- 

 mate turn. Sutures strongly constricted. Periphery of the last 

 whorl marked by a feeble angulation. Base moderately long, well 

 rounded, marked by closely crowded, spiral striations. Aperture 

 subcircular; outer lip forming a thickened peristome; inner lip strongly 

 curved and somewhat reflected; parietal wall covered with a thick 

 callus, which renders the peritreme complete. 



The type, Cat. No. 187037, U.S.N.M., comes from Port Alfred 

 (Coll No 574) It has seven postnuclear whorls remaming, and 

 measures: Length, 12 mm.; diameter, 6 mm. Cat No -250412, 

 U.S.N .M., contains another specimen from Port Allred (Coll. JNo. 

 1285). 



EPITONIUM, species? 



Cat No. 250411, U.S.N.M., contains the tip of a broadly conic 

 little Epitonium, which has fine axial ribs, and spiral lirations in the 

 intercostal spaces. It is different from any Epitomum known from 

 South Africa and comes from Port Alfred (Coll. No. 1284). 



