508 PROCEEDINGS OF THE NATIONAL MUSEUM. voi. xxxni. 



2T upon the penultimate whorl. Intercostal spaces only moderately 

 deep, a little wider than the ribs, marked by 6 strong- incised spiral 

 lines which extend up on the sides of the ribs and frequently pass 

 over their summits; the uppermost or posterior one of these incised 

 lines is least pronounced, the second one above the suture, and the 

 third one about half again as far apart as the remaining, which are 

 equally spaced. In addition to these the shell is marked b}" many 

 faint wavy spiral striations between the deep ones. Sutures plain, 

 well defined. Base of the last whorl very short, well rounded, marked 

 by the faint continuations of the axial ribs and about 15 well defined 

 more or less equally spaced deep spiral striations with fainter ones 

 between them as on the exposed portion of the whorls of the spire; 

 the first deep basal spiral striation and the one above the suture are 

 some little distance apart and mark a plain band excepting the fainter 

 sculpture. Aperture quite larg-e, subquadrate; columella short, some- 

 what twisted, revolute. 



The type (Cat. No. 162679, U.S.N.M.) was dredged by the U. S. 

 Bureau of Fisheries steamer Albatross at Station No. 2902, ofi" Santa 

 Barbara, California, in 53 fathoms. It has 12 post-nuclear whorls 

 which measure: Length 11.2 mm. ; diameter 2.8 mm. 



Another specimen (Cat. No. 162680, U.S.N.M.) was dredged at 

 Station No. 3195, in 252 fathoms, on green mud, bottom temperature 

 43"-*. 2, in San Luis Obispo Bay, California. Four specimens (Cat. No. 

 162681) were dredged at Station No. 2901 on grey sand and mud 

 bottom, at a depth of 48 fathoms, temperature 55°. 1, ofi' Santa Rosa 

 Island. The University of California has two lots, one specimen 

 dredged at Station No. 32, off Catalina Island, and two from Station 

 No. 59, off San Diego, California. 



TURBONILLA (PYRGISCUS) TENUICULA Gould. 

 Plate XLV, figs. 3, 3(/. 



Chemnitzia lenuicula Gould, Bost. Jour. Nat. Hist., VI, 1853, pp. 383, 384, pi. 



XIV, fig. 15. 

 Turhonilla {Pyrgiscus) tenulcula Govlv, Mem. Cala. Acad., Ill, 1903, pp. 275-276, 



pi. II, tigs. 7, 7a. 



Shell small, elongated, lanceolate, turrited, rather solid, shining, 

 wax yellow, a little dusky below the suture; whorls 10, flat, slightly 

 shouldered above, marked by about 20 direct, longitudinal folds, the 

 summits of which are cut by numerous fine revolving strife, deeper 

 in the interstices, which also extend over the base of the shell, though 

 the folds terminate at the periphery, or are extended in delicate fur- 

 rows; aperture narrow, ovate; lip sharp; revolving striae apparent 

 within. 



Dimensions. — Length 7.5 mm.; diameter 1.8 nun. 



Found at Santa Barbara. 



