22 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



DRILLIA THETIS Smith. 



Cat. No. 186680, U.S.N.M., four specimens from Port Alfred (Coll. 

 No. 36). Cat. No. 249733, U.S.N .M., contains another specimen from 

 the same locality (Coll. No. 1005). 



DRILLIA NIVOSA Smith. 



Cat. No. 186681, U.S.N.M., five specimens from Port Alfred (Coll. 

 No. 37). Cat. No. 249731, U.S.N.M., contains two additional speci- 

 mens from the same locality (Coll. No. 1003). 



DRILLIA SUBCONTRACTA Smith. 



Cat. No. 186282, U.S.N.M., five specimens from Port Alfred (Coll. 

 No. 38). Cat. No. 272114, U.S.N.M., one from South Africa. 



DRILLIA PRAETERMISSA Smith. 



Cat. No. 186683, U.S.N .M., four specimens from Port Alfred (Coll. 

 No. 39). Cat. No. 187002, U.S.N.M., two specimens from the same 

 source (Coll. No. 534). Cat. No. 227762, U.S.N .M., two specimens 

 from the same locality (Coll. No. 857). 



DRILLIA LARA, new species. 

 Plate 2, fig. 4. 



Shell fusiform, orange yellow; shoulder a little lighter colored than 

 the rest of the turns. Posterior third of the whorls between the 

 sutures marked by a concave sulcus, which is crossed by fine 

 retractive lines of growth and many, very fine, closely spaced, wavy, 

 spiral striations. Anterior two-thirds of the whorls between the 

 sutures marked by low, rounded, decidedly protractive, axial ribs, 

 which are truncated posteriorly at the anterior margin of the sulcus; 

 anteriorly they pass feebly over the periphery and part of the base. 

 There are 12 of these ribs upon all but the penultimate turn; the 

 latter has 14. The ribbed portion of the whorl on the spire is marked 

 by about 20 equal and equally spaced spiral striations. Intercostal 

 spaces ahnost as wide as the ribs. Summits of the whorls appressed. 

 Sutures ill defined. Base of the last whorl gently rounded posteriorly, 

 the somewhat produced extremity giving the left outline a slightly 

 concave appearance in the middle. The posterior portion of the 

 base is spirally striated like the space immediately posterior to it. 

 Anteriorly the base is marked by slender spiral lirations, which are 

 strongest at the basal extremity. Aperture of irregular outline; outer 

 Up deeply channeled at the posterior angle, very strongly curved in 

 the middle, the edge of which is infolded; columella moderately long, 

 stout, covered by a slight callus which extends up over the parietal 

 wall, in the posterior part of which it becomes somewhat thickened. 



