16 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



groove of the sinus. The lirae, between the spiral striations and the 

 axial lines of growth, inclose numerous small pits, giving the entire 

 surface between the sutures the appearance of a grating. On the 

 base the lines of growth are less strongly developed and the pitting 

 is less pronounced. Aperture rather short; posterior angle obtuse; 

 the sinus is about as broad as the cord above it at the summit of the 

 whorls. The space between the sinus and the anterior portion of 

 the outer lip forms a claw-like element. Columella strong, its inner 

 edge, like the parietal wall, glazed with a thin callus. 



The type and another specimen, Cat. No. 250460, U.S.N.M., come 

 from Port Alfred (Coll. No. 1333). The type has lost the nucleus; the 

 seven whorls remaining measure: Length, 20.5 mm.; diameter, 7 mm. 



CLIONELLA NEREIA, new species. 

 Plate 2, fig. 8. 



Shell fusiform, chestnut brown variegated with yellowish brown and 

 white, with the apex and anterior portion of base a little lighter than 

 the rest. Whorls with a low rounded subsutural spiral keel that 

 is about one-fifth the width of the space between the sutures. The 

 keel is bordered anteriorly by a shallow sulcus which is about half as 

 wide as the keel. The remaining portions of the whorls on the spire 

 are marked by low, rounded, protractive, axial ribs, which vary 

 somewhat in strength. Of these, there are 14 upon the third; 1G 

 upon the fourth; 18 upon the fifth; and 16 upon the penultimate 

 "turn. In addition to the ribs, the ribbed part of the whorl between 

 the sutures is marked by four, strongly incised, equal and subequally 

 spaced, spiral lines. Summits of the whorls rounded. Sutures well 

 impressed. Posterior half of the base well rounded, marked by 

 several well incised spiral . lines ; and the weak continuations of the 

 axial ribs. Anterior half produced, ornamented by five moderately 

 strong lirations. Entire surface of spire and base covered by num- 

 erous strong incremental lines, which are slightly retractive on the 

 subsutural keel and protractive on the rest of the shell. Aperture 

 irregular; posterior angle acute; sinus deep and narrow, somewhat 

 below the summit; outer lip strongly curved; columella short and 

 slightly curved, glazed with a thin callus which also extends upon 

 the parietal wall. 



The type, Cat. No. 205942, U.S.N.M., comes from Port Alfred 

 (Coll. No. 24) . It has seven whorls, and measures : Length, 1 4.0 mm. ; 

 diameter, 5.7 mm. Cat. No. 250456, U.S.N.M., three from the same 

 place (Coll. No. 1329). Cat. No. 272il6,U.S.N.M., contains two addi- 

 tional specimens from South Africa. 



CLIONELLA ELIZABETHAE, new species. 



Plate 4, fig. 1. 



Shell broadly fusiform. Posterior two-fifths of the whorls between 

 the sutures with a strongly excavated channel; anterior three-fifths 



