204 ('ALII'OltN'IA ACADKMV Ol" SCIENCES. 



Goiiiis Drillia Uraii. 



Shell lurriculatftl; aperture oval, oblique; canal sliort, twisted; coluiiK-lla lip strongly 

 callous above. 



Plcuidtomn yibhot^n Kieiier is a cliaracteristic species. 



171. Drillia cancellata Carpenter. 



Diiliiacanctl/ala QvR., Hi it. Assn. Rept., 1S63, p. 658; I'roo. I'hil. Acad. Nat. vSci., 1865, p. 63. 

 Trvon. Man. ("onch., Vol. V'l, p. 183, 1884. 



Shell resembles D. inertuis in shape; whoils eiylil or nine, nearly flat, bm slightly angiilatici 

 near anterior margin; decoration consists ol five to si,\ spiral lidges and about twenty-five rather 

 more prominent transverse, slightly oblique ribs, the whole giving the whorls a cancellated apjiear- 

 ancc; suture impressed, distinct; canal long, prominent. 



The four specimens found wore young, and \w adidt ha.s so far been recorded 

 from this formation. 



Found in tlie lower San Pedro series of Dcadnian Island, and in tlie upper 

 San Pedro series of Los Cerritos. Fotind in the Plcihitocene at Spani.sh JJight, 

 San Diego. 



Living.- — Puget Sound (Carpenter). 



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



172. Drillia hemphilli Stearns. 



I'LATK V, FlO. 8. 



Drillia hemphilli Stearns, Proc. Cal. Acad. Sci., Vol. V, 1874, p. 80, PI. I, fig. 3. Trvon. Man. 

 Conch., Vol. VI, p. 185. PI. Xlll, fig. 49, 1884. 



Shell small, elongate, slender; ape.x acute; whorls eight, slightly convex, with fifteen 

 distinct, transverse, slightly oblique, rounded ribs; flat anterior sutural riblet about one-fifth the 

 width of wliole whorl; suture impressed, distinct; spiral sculpture consists of a few faint grooves; 

 outer lip thin, bulging anteriorly below posterior sinus, which is deep and narrow; anterior sinus 

 short; inner lip and inner side of columella incrusted. 



Dimensions.- — Long. 16 mm.; lat. 5 mm.; body-whorl 8 mm.; aperture, including canal, 

 5.5 mm.; defl. 20 degrees. 



Tlie specimen described is I be largest one found, the normal length being 

 about 10 mm. Distingui.sbalilc by its small size, pi'oniiiicnt sutural ril)lel, and 

 oblique transverse ridges. 



Found in lower San Pedro series of Deadman Island and San Pedro, and in 

 the upper San Pedro series of Los Cerritos, San Pedro, and Crawlisb George's. 

 Found in the Pleistocene at Barlow's ranch, Ventura; and at Spanish Bight and 

 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. — Lower California (Stearns). 



Pleistocene. — San Pedro; Ventura (Arnold): San Diego (Stearns; Arnold; 

 Hemphill). 



