238 GALirOKNIA 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. 



Dime7isio7is. — Long. 8.2 mm.; lat. 3 mm.; body-whorl 5.5 mm.; aperture 3.4 mm.; defl. 

 44 degrees. 



Rare iu the lower San Pedro series at Deadraan Island and San Pedro; not 

 uncommon in the ujij^er 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 (.^Esopus) oldroydi, sp. nov. 



Pl.\te 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, ihe 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 H. ct A. Adams. 



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

 callous; outer lip sinuous posteriorly, crenulated within. 



Astyris clausilicbforme Kiener is a characteristic species. 



231. Columbella (Astyris) californiana Gaskoin. 



Plate X, Fu:. 9. 



Columbella {Astyris') cali/ornia7ia G ASK., Proc. Zool. Sec, 1851, p. 12. 

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



This species resembles A. (jausapata quite closely, but difi'ers from il in the 

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



