82 CALIFORNIA ACADEMY OF SCIENCES. 



MOLLUSCA (Continued). 



300. (P.) adleri Dall & BART.SCH, sp. nov 280 



Genus Pyramidella Lamarck 280 



301. (P.) conica var. variegata Carpenter 280 



Genus Odostomia Fleming 281 



Section Odostomia (Fleming) s. s 281 



302. (O. ) tenuis Carpenter 281 



Section Evalea A. Adams 281 



[S. D.] (E.) stearnsii Dall & Bartsch, sp. nov 282 



303. (E.) gouldil Carpenter 282 



Section Amaura Moller 282 



[S. D.] (A.) pupiformis Carpenter 283 



304. (A.) nuciformis Carpenter, Tar. avellana Carpenter. 283 

 Section Chrysallida Carpenter 283 



[S. D.] (C.) diegensis Dall & Bartsch, sp. nov 284 



Section Oscilla A. Adams 284 



[S. D.] (O.) sequisculpta Carpenter 284 



[S. D.] (O.) grammatospira Dall & Bartsch, sp. nov 285 



Subgenus Ivara Dall & Bartsch, subgen. nov 285 



305. (I.) terricula (Carpenter) Dall & Bartsch 285 



SUPERFAMILY TjENIOGLOSSA 285 



Family LXV. Tritonidtx 285 



Genus Tritonium Link 285 



306. gibbosus Broderip 286 



Subgenus Priene H. & A. Adams 286 



307. (P.) oregonensis Eedfield 286 



Genus Ranella Lamarck 287 



308. ealifornica Hinds 287 



Family LX VI. Cypraidce 288 



Gemis Cyprsea Linn£ 288 



309. spadieea Gray 288 



Genus Trivia Gray 288 



310. ealifornica Gray 288 



311. solandri Gray 289 



Genus Erato Kisso 289 



312. columbella Menke 289 



Family LX VII. Triforidce 290 



Genus Triforis Deshayes 290 



313. adversa Montagu 290 



SUPERFAMILY CERITHIACEA 290 



Family LX VIII. Cerilhiopsidce 290 



Genus Seila A. Adams 290 



314. assimilata C. B. Adams 290 



Family LXIX. Cerithiidm 291 



Genus Bittium Leach 291 



315. asperum Gabb 291 



316. calitornicum Dall & Bartsch 291 



317. filosum GonLD 292 



318. quadrifilatum Carpenter (with evolutionary discus- 



sion of several species) 292 



319. rugatum Carpenter 295 



320. williamsoni, sp. nov 295 



Subgenus Styliferina A. Adams 295 



321. (S.) tenuiscnlpta Carpenter 296 



Genus Diastema Deshayes 296 



322. sp. indet 296 



Genus Cerithidea Swainson 296 



323. ealifornica Haldemann 296 



Family LXX. Oacidce 297 



