34 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



threadlike, retractive, axial riblets and spiral lirations. The spiral 

 lirations are of varying strength. The strongest is at the angle of 

 the shoulder and its junction with the axial riblets forms a series of 

 sharp tubercles. Two other spirals, one at the periphery and another 

 a little posterior to the middle between the angulated shoulder and 

 the periphery, are of equal strength, and form weak tubercles at 

 their juncture with the riblets. The flat summits of the whorls are 

 marked by nine fine lirations, while the space between the angle and 

 the strong supramedian liration is marked by one moderately strong 

 thread followed by a weak one, which is succeeded by a stronger one 

 and three slender threads. The space between the tuberculated 

 median and peripheral cords is marked by three moderately strong 

 lirations, which in turn are separated by finer raised threads. Pe- 

 riphery rendered slightly angulated by the cord. Base of the last 

 whorl with a deep, moderately broad umbilicus, the space between 

 the umbilical margin and the periphery well rounded, marked by six 

 equal and equally spaced lirations which equal the median one of 

 the spire in strength. These lirations, like those of the spire, are 

 separated by finer ones, two of which usually occur in the space 

 between them. Umbilicus marked by strong fines of growth and 

 slender, crowded, equally developed, raised spiral threads. Aperture 

 angulated pear-shaped; outer lip angular; columella strongly re- 

 flected, almost straight, provided with two strong oblique folds. 



The type, Cat. No. 17074, U.S.N.M., has five post-nuclear whorls 

 and measures: Length, 18 mm.; diameter, 13.4 mm.; greatest length 

 of aperture, 11 mm.; greatest diameter of aperture, 8 mm.; width of 

 shoulder immediately behind the aperture, 2 mm. The type comes 

 from the Cape of Good Hope. 



Family OLIVIDAE. 



Genus EBURNA Lamarck. 



EBURNA PAPILLARIS Sowerby. 



Cat. No. 227773, U.S.N.M., one specimen from Port Alfred (Coll. 

 No. 868). 



Genus ANCILLA Lamarck. 



ANCILLA OBTUSA Swainson. 



Cat. No. 227771, U.S.N.M., one specimen from Port Alfred (Coll. 

 No. 866). 



ANCILLA DECIPIENS Sowerby. 



Cat. No. 163022, U.S.N.M., contains one specimen from Kowie, ob- 

 tained from Sowerby and Fulton. 



ANCILLA REEVEI Smith. 



Cat. No. 186702, U.S.N.M., six specimens from Port Alfred (Coll. 



No. 62). 



