112 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



CERITHIOPSIS (CERITHIOPSIS) NISABA, new species. 

 Plate 12, fig. 3. 



Shell elongate-conic, light chestnut brown, with the peripheral 

 cord darker. (Nuclear whorls decollated, except a portion of the last 

 turn, which is smooth. ) Postnuclear whorls shouldered at the sum- 

 mit, moderately rounded, marked by three spiral cords, of which the 

 first is at the summit, while the third is about as far posterior to the 

 suture as it is distant from the median cord; the median cord is mid- 

 way between the other two. In addition to the spiral cords, the 

 whorls are marked by axial ribs almost as strong as the spiral cords. 

 Of these ribs, 16 occur upon the first to third, 18 upon the fourth to 

 sixth, 20 upon the seventh, and 22 upon the penultimate turn. The 

 junction of the axial ribs and the spiral cords, form tubercles, while 

 the spaces inclosed between them appear as well impressed, rounded 

 pits. The tubercles on the cords at the summit are well rounded, 

 those on the other two cords are truncated posteriorly, sloping gently 

 anteriorly. Sutures channeled. Periphery marked by a very strong, 

 smooth, spiral cord, the space between which, and the suprasutural 

 cord, is crossed by the continuation of the axial ribs. Base moderately 

 long, moderately rounded, marked by a strong spiral cord at the 

 insertion of the columella, Aperture decidedly channeled anteriorly, 

 feebly so at the posterior angle, rounded; outer lip rendered sinuous 

 by the external sculpture; columella very stout, covered on the inner 

 edge by a thick callus which extends over the parietal wall, connect- 

 ing with the outer lip at the posterior angle and rendering the peri- 

 treme complete. 



The type and the specimens, Cat. No. 249688, U.S.N.M., come from 

 Port Alfred (Coll. No. 960). The type has a portion of the last 

 nuclear whorl and a little more than eight postnuclear turns and 

 measures: Length, 3.4 mm.; diameter, 1.1 mm. Cat, No. 250360, 

 U.S.N. M., contains another specimen from Port Alfred (Coll. No'. 

 1233). 



CERITHIOPSIS, species? 



Cat, No. 249691, U.S.N.M., contains two specimens from Port 

 Alfred, of a short, light brown, oval species (Coll. No. 963). I can not 

 identify these with any of the known forms, and they are too poor to 

 serve for a diagnosis of a new species. 



CERITHIOPSIS ( CERITHIOPSIS 1 SABA, new species. 



Plate 12, fig. 8. 



Shell small, ovoid, chocolate brown, excepting the tubercles of the 

 spiral cord at the summit, which are smoky white. A portion of 

 the last nuclear turn only remains, which is white and smoky. Post- 

 nuclear whorls well rounded, marked by three strong spiral cords, of 



