ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 



657 



856. ? Amphithalarmis lacunatus, n. s. Same nucleus ; base chinked, not keeled. 

 (Adult not found.) 



Family TruncateUidce, 



357. Truncatella Californica, Pfr. Pneum. Viv. Suppl. vol. ii. p. 7. 



Family Jejfreysiadce. 



358. .Teffreyna Ahleri, Cpr. Maz. Cat. no. 420. 



359. Jefreysia translucem, n. s. Possibly a Barleeia : pillar thickened, hase rounded. 

 36). Cithna albida, n. s. Very close to C. tumens, Maz. Cat. no. 421, but umbilicus 



angled, not keeled. 



Family Planaxidce. 



361. Biala marmorea, n. s. Solid, glossy, clouded with red : hase fointly angled. 



362. Diaki acuta, n. s. Base flattened, sharply angled : turrited. Bch.-lO I'm. Cp, 



363. Styliferina turrita, n. s. Minute, slender, hase rounded. 



Family Ovulidce. 



364. Radius variabilis, C. B. Ad. Maz. Cat. no. 435. Probably exotic. 



Family Cypraida. 



365. Luponia spadicea, Gray. Like onyx, but light-coloured. 



366. Trivia Californica, Gray. Small : ribs sharp, distant. 



337. Trivia Solandri, Gray. Maz. Cat. no. 441. From Southern fauna. Sta. Barb. 

 and St. Nich. Is. coinmon, Cp. 



368. Erato vitellina, Hds. Sulph. Large, wide-mouthed : paries callous. 



369. Erato colmnbella, Mke.=l<'ucoph(ea, Gld. Maz. Cat. p. 537. Perhaps a var. of 



3Iaugerce, from the tropics. 20-40 fm. c. Cp. 



Suborder Toxieera. Family Terebridce. 



370. Myurella simplex, n. s. Sculpture very faint and variable : shape of albocincta. 



c. Cp. 



Family Pleurotomidce. 



371. Drillia inermis, Hds. Sulph. Early whirls close sculptm-ed. Beach-16 fm. 



living. Cp. 



372. Drillia incisa, n. s. Like inermis : spiral sculpture grooved, not raised. 



373. DriJlia mcesta, n. s. Like large luctunsa : middle whirls with long transverse 



ribs and posterior knobs ; adult obsolete. 



374. Drillia torosa, n. s. "WTiirls rounder, olivaceous : with one row of strong bosses 



throughout : no posterior knobs. 

 374 h. Drillia .*var. aurantia. Oraui^e, with sutiiral rlblet and faint spiral sculpture. 

 1863. 143 



