32 BULLETIN (>S, UNITED STATES NATIONAL MUSEUM. 



U.S.N.M., covers seventeen individuals from San Pedro, Califor- 

 nia. About twenty from the same place were identified for Mrs. 

 Oldroyd. Cat. no. 195334, U.S.N.M., seven specimens from San 

 Dieg^o, California. Three individuals were dredo;ed by the University 

 of California, off San Diec^o, California. 



TURBONILLA (TURBONILLA) ACRA, new species. 

 Plate 2, %. 14. 



Shell very lono; and slender, milk-white. (Nuclear whorls decol- 

 lated.) Post-nuclear whorls hic;h between the sutures, varyino; in 

 outline, the first to eleventh being flattened, almost cylindric, with 

 very strongly shouldered summits, the rest moderately well rounded, 

 with less strongly shouldered summits. Axial ribs very strong on 

 the first 11 whorls, less so and more rounded on the remaining. 

 There are about 14 upon each of the first eleven turns, 22 upon the 

 twelfth, 20 upon the thirteenth, fourteenth, and fifteenth, and about 

 30 much enfeebled and irregular ones upon the last turn, where they 

 pass over the well-rounded periphery and base to the umbilical 

 region. On the early turns the axial ribs terminate as strong, exserted 

 cusps at the summit; on the last turns they are merely rounded. 

 Early sutures strongly marked, later ones well impressed. Aperture 

 ovate, posterior angle acute; outer lip tliin; columella slender, 

 almost straight, obliquely inserted. 



The type (Cat. no. 206848 U.S.N.M.) has seventeen whorls, and 

 measures: Length 10 mm., diameter 1.8 mm. Tt was collected off 

 CataUna Island, (California. 



TURBONILLA (TURBONILLA) LUCANA, new species. 

 Plate 2, fig. 3. 



Shell elongate-conic, milk-white. (Nuclear whorls decollated.) 

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

 weakly shouldered, marked by slender, sinuous, retractive axial ribs, 

 of wliich 20 occur upon the third, 22 upon the fourth and fifth, 26 

 upon the sixth and seventh, and 30 upon the penultimate whorh 

 Intercostal spaces a little narrower than the ribs, shallow, the de- 

 pressed portion terminating at the periphery. Sutures w^ell marked. 

 Base moderately long, marked by the slender continuations of the 

 axial ribs, which extend to the umbilical area. Aperture oval; pos- 

 terior angle acute; outer Up thin, showing the external markings 

 within; columella moderately strong, curved, reenforced by the 

 attenuated base for two-thirds of its length and provided with a weak 

 fold at its insertion. 



The type (Cat. no. 4103, U.S.N.M.) was collected by J. Xantus at 

 Cape St. Lucas, Lower Cahfornia. It has nine post-nuclear whorls, 

 wliich measure: Length 6 mm., diameter 1.5 mm. 



