238 CALIFOKNIA ACADEMY OF SCIENCES. 



aperture ovate; canal short; outer lip thickened by several longitudinally elongate denticles on inner 

 side; inner lip curved, smooth; spiral ornamentation prominent on lower portion of columella. 



Dimensions. — Long. 8.2 mm.; lat. 3 mm.; body-whorl 5.5 mm.; aperture 3.4 mm.; defl. 

 44 degrees. 



Rare in the lower San Pedro series at Deadman Island and San Pedro; not 

 uncommon in the upper San Pedro series at San Pedro. Found also in the Pleisto- 

 cene at Twenty-sixth street, San Diego. The specimen figured is from the upper 

 San Pedro series at San Pedro, and is now in the collection of Delos Arnold. 



Living. — San Pedro to San Diego (Cooper). 



Pleistocene. — San Pedro; San Diego (Arnold). 



230. Columbella (.ffisopus) oldroydi, sp. nov. 



Plate VI, Fig. 7. 



Shell small, slender, fusiform; spire elevated; apex rounded; whorls seven, convex; first 

 three whorls smooth, remainder, with exception of body-whorl, ornamented with about eighteen 

 transverse ridges and two or three rather indistinct spiral grooves, the whole giving a cancellate 

 appearance to the surface; on the body-whorl the transverse and spiral sculpture are of about equal 

 prominence, the transverse sculpture being more subdued than on the whorls above it; suture quite 

 deeply impressed; aperture narrow, elliptical; pillar truncated anteriorly; outer lip smooth, thin; 

 inner lip smooth. 



Dimensions. — Long. 9 mm.; lat. 2.6 mm.; body-whorl 5 mm.; aperture 3 mm.; defl. 

 24 degrees. 



Distinguishable from A. chrysalloidea by slenderer form, prominently sculp- 

 tured surface, deeper suture, and smooth inner lip. Pronounced a new species by 

 Dr. Dall. 



Lower San Pedro series at Deadman Island; rare. The specimen figured is 

 the type, and is now in the collection of Mrs. Oldroyd. 



Pleistocene. — San Pedro (Arnold). 



Subgenus Astyris //. ct A. AJams. 



Shell oval-fusiform, smooth or transversely striated; aperture oval; inner lip smooth, not 

 callous; outer lip sinuous posteriorly, crenulated within. 



Astyris clausilimforme Kiener is a characteristic species. 



231. Columbella (Astyris) californiana Gaskoin. 



Pl.\te X, Fk;. 9. 



Columbella {Astyris) californiatia Gask., Proc. Zool. Soc, 1851, p. 12. 

 Columbella californiana Gask., Cpr., Brit. Assn. Rept., 1856, p. 341. 



This species resembles A. cjausapata quite closely, but differs from it in the 

 following respects: it is slightly broader, has more swelling whorls, more prominent 



