ON MOLLTJSCA OF THE WEST COAST OF NORTH AMERICA. 



C^.l 



251. Lrpeta cerrokhs, ?n. s. Like cceca, but apex turned back. FaraUone L'-t 



teste R. D. Darbishire. 



Family Gadiniadee. 



252. Rowellia, sp. Genus proposed by Cooper : tentacles flattened, pertinated. Cat. 



It;. Cp. Far. Is. Row. 



Family Fissurellida. 



253. I'isstinlla roIcano,^ye. = ornafa,^utt. Approaches Pert/r«"</»fl : hole vari.able. 



254. Glyphis aspera, Each. =Lincolin, Gray =cratitia, Gld. Large, coarsely sculp- 



tured, with colour-rays. 



255. Glyphis densielathrati, Rve. Smaller : with closer, finer sculpture. 

 250. Litcapina n-enulnta, Shy. Tank. Very large : internal. 



257. Pundurelln eucuUata, Gld. E.E. Large, with strong, variable ribs, 15-40. 



Hole simple. 

 25^. PanctureUu yakata, Gld. E.E. Scarcely differs from noac/iinn, but tripartite 



process more strongly marked. 

 259. PunctureUa Cuoperi, n. s. Outside like galeata, but without props to the 



lamina. 30-120 I'm. not r. Cp. 



Family Haliottda. 



230. Ilaliotis Craclierodii, Leach, auct. The trade species, smooth, dai-k olive : holes 



5-9. Var. (Mifnrniensia, holes 9, 10, 11. 

 2QI. Ilaliotis i^plendens, live. Hatter, grooved, lustrous. Holes 4-7. Below tide: 



on rocks, Q). 



202. Htdiotis corruqata. Gray. Large, arched, very rough, 



tide : on rocks, Cp. 



203. Hnliotis rufesceiis, Swains. Large, flatter, waved, rich orange-red. 



.3-5. Below tide : on rocks, Cp. 



204. Ilaliotis Kamtschatkana, .fouas. Small, thin, arched, waved. Holes 4, 6k 



Below tide : on rocks, Far. Is. Cp. 



Holes 3-5. Below 

 Holes 



205. 



200. 

 207. 



Family Trothidee. 

 Phfw'ntwlla compta, Gld. Otia. Maz. Cat. no. 284. Like^»<//i«, a little longer 



and flatter; out operc. bevelled and striated. ?\ax. pkHotJiv, exactly liko 



Ilerm shells : ? var. e/afior. dwarfed, longer and flatter : var. jinnctutata, with 



close rows of dots ; pilar chinked. 8-20 fm. Cp. 

 Pamaidiuc undosus, Wood, ^'ery large : operculum with 2 ridgt -i. 

 Pachypoma yihhero*nm, Chem. ?=iHtequale, Mart. Large, rough : operc. 



swollen, simple. (Dtad.) 



137 



