46 



BULLETIN (is, UNITED STATES NATIONAL MUSEUM. 



The type (Cat. no. 162515, U.S.N.M.) and three additional speci- 

 mens were dredged at U. S. Bureau of Fisheries station 2830, in 66 

 fathoms, temperature 74°. 1, off Lower CaHfornia. The type is not 

 quite mature ; it has nine post-nuclear whorls, and measures ^ Length, 

 4.5 nun.; diameter, 1.3 mm. 



The following specimens have been examined: 



TURBONILLA (STRIOTURBONILLA) ATTRITA, new species. 



Plate 4, figs. 11, lUi. 



Shell slender, elongate-conic, bluish-white. Nuclear whorls small, 

 two and one-half, depressed, helicoid, having their axis at right 

 angles to that of the succeeding turns, in the first of which they are 

 slightly immersed. Post-nuclear whorls very high between the 

 sutures, almost flattened, ornamented with very low, flattened, 

 somewhat irregular, protractive axial ribs, which are best developed 

 on the early whorls. Of these there are IS upon the second, 22 upon 

 the tliird, IS upon the fourth and fifth, 22 upon the sixth, 18 upon the 

 seventh, 20 upon the eighth and ninth; on the next turn they become 

 quite enfeebled, and on the penultimate turn they are obsolete. Inter- 

 costal spaces about half as wide as the ribs and very shallow. Sutures 

 well impressed. Peripherv of the last whorl well rounded. Base 

 short, somewhat inflated. Entire surface of the spire and base 

 marked by numerous very fine, wavy spiral striations. Aperture 

 broadly oval; posterior angle acute; outer lij) thin; columella short, 

 slender", somewhat curved, and slightly reflected. 



The type and six individuals (Cat. no. 163248, U.S.N.M.) come 

 from San Pedro, California. The type has twelve post-nuclear 

 whorls and measures: Length 7.4 mm., diameter 1.6 mm. Cat. 

 no. 163243, U.S.N.M., contains five specimens from San Pedro, Cali- 

 fornia. Another specimen (Cat. no. 152314, U.S.N.M) comes from 

 San Diego, California. Another specimen in Mr. Berry's collection 

 is from Long Beach, California. 



TURBONILLA (STRIOTURBONILLA) NICHOLSL new species. 

 Plate 3, fig. 2. 



Shell large antl robust, milk-white. (Nuclear whorls decollated.) 

 Post-nuclear whorls well rounded, slightly shouldered at the summit, 

 marked by strong, somewhat sinuous, decidedly protractive axial 



