72 BULLETIN 68, UNITED STATES NATIONAL MUSEUM. 



below the summits, and one al)oiit one-third as wide, a httle anterior 

 to the middle of the remaining light area. Posterior half of base a 

 little lighter brown than the bands between the sutures, grading into 

 white on the anterior half. (Nuclear whorls decollated.) Post- 

 nuclear whorls slightly shouldered, flattened, somewhat contracted 

 at the peripheiy, marked by strong, well rounded, almost vertical 

 axial ribs, of which there are 22 upon the fourth to sixth, 24 upon the 

 seventh to ninth, 26 upon the tenth, and 30 upon the penultimate 

 turn. Intercostal spaces a little narrower than the ribs, well 

 impressed. Sutures strongly impressed, rendered sinuous by the 

 strong terminations of the axial ribs at the summits of the whorls. 

 Periphery of the last whorl well rounded. Base moderately long, 

 well rounded. Entire surface of spire and base marked by numerous, 

 very closely crowded, wavy, spiral striations. Aperture large; poste- 

 rior angle acute; outer lip thin, showing the external sculpture and 

 color bands within; columella very oblique, almost straight and 

 slightly revolute. 



The type (Cat. no. 173080, U.S.N.M.) was collected by Mr. Lowe 

 at Long Beach, California. It has lost the nucleus and the first three 

 post-nuclear whorls. The nine remaining measure : Length H .7 mm., 

 diameter 3.5 mm. The University of California has obtained this 

 species at the following stations: 14 ^^' off Point Firmin; 21 "^ off 

 Catalina Island; 32 off Catalina Island; 73 off San Diego, California. 



Named for Prof. Josiah Keep. 



TURBONILLA (PYRGOLAMPROS) HALISTREPTA, new species. 



Plate 5, fig. 2. 



Shell elongate-conic, wax ^^ellow with a broad subsutural, narrow 

 submedian and a broad subperipheral band of golden brown. (Nuclear 

 whorls decollated.) Post-nuclear whorls rather high between the 

 sutures, very slighth^ shouldered, marked by almost obsolete, nearly 

 vertical axial ribs, which are best developed near the summit and 

 practically disappear before they reach the suture on the early whorls; 

 on the last three they are scarcely indicated. Of these ribs there 

 are about 28 upon the third and 24 upon the seventh whorl. Sutures 

 well impressed. Periphery and the short base of the last whorl some- 

 what inflated, well rounded. Entire surface of spire and base marked 

 by many well incised, closely spaced, wavy, spiral striations. Some 

 of the fine lirations between the incisetl lines are a little darker colored 

 than the rest of the surface and appear as reddish-brown hair lines. 

 Aperture oval; posterior angle acute; outer lip tliin, showing the 

 external markings within; columella slender, strongly curved and 

 moderately revolute. 



The type (Cat. no. 205954, U.S.N.M,) was dredged by the Univer- 

 sity of California, off Newport, California. It has lost the nucleus 



