ON MOLLL'SCA OF THE WEST COAST OF NORTH AMERICA. 



657 



356. ? Amphithalamus lacunatus, n. s. Same nucleus ; base chinked, not keeled. 



(Adult not found.) 



Family Truncatellidce. 



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



Family Jeffreysiad<e. 



358. Je/reysia Alderi, Cpr. Maz. Cat no! 420. 



359. Jeffreysia translucens, n. s. Possibly a Barleeia : pillar thickened, base rounded, 



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



angled, not keeled. 



Family Planaxidee. 



361. Diala marmorea, n. s. Solid, glossy, clouded with red : base faintly angled. 



362. Diala acuta, n. s. Base flattened, sharply angled : turrited. Beh.-10 fin. Cp. 



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



Family Ooulidce. 



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



Family Cyprteida. 



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



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



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



and St. Nich. Is. common, Cp. 



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



369. Erato columbella, Mke.=leucophcea, Gld. Maz. Cat. p. 537. Perhaps a var. of 



Maugerce, from the tropics. 20-40 fm. c. Cp. 



Suborder TOXIFERA. Family Terebridce. 



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

 c. Cp. 



Family Pieurotomida. 



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



living. Cp. 



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



373. Drillia mceata, n. s. Like large luctuosa : middle whirls with long transverse 



ribs and posterior knobs ; adult obsolete. 



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



throughout : no posterior knobs. 



374 b. Drillia Fvar. aurantia. Orange, withsutural riblet and faint spiral sculpture. 

 1863. 



