ON MOLLUSCA OP THE WEST COAST OP NORTH AMERICA. 



6'IJ 



152. Yoldia lanceolata, 3. Shy. Hani. = arctica, Brod. & Sby. (Not Adrana I., Lam. 



G. Shy.) With ant. diagonal lines. 



153. Yoldia amygdala, var. teste Hani. Like lanceolata, without posterior wing, 



and anterior sculpture. 



Family ? Trigoniadce. 



154. FerfjcorcZea orwote, D'Orb.=«ot'e»!Costoto, Ad. &Rve. Samarang. Exactly 



accords with Chinese types. S. A. 20--40 fm. Cp. 



Family Aviculidce. 



155. Bryophila setosa, n. g., n. s., Ann. N. H. 1864, p. 10. Like minute, broad Pinna, 



Animal ovoviviparous. Sta Barbara, 20 fm. Cp. 



Family Pectinidcs. 



156. Zima orientalis, Ad. & Rve., Samarang, in Mus. Ci\m.!= dehiscens, Oonr. fossil, 



teste Cp. Veiy close to young of L. hians, var. termra. Beach to 20 fm. c. Cp. 



157. Ldmatula suhaurimdata, Mont. Fbs. & Hani. Circumboreal. Fossil in Crag. 



Islands, 40-120 fm. not r. ; S. Diego, 1 valve, 4 fm. Cp. 



158. Pecten hastatus, Shy. = he)-iceus,G\A. Elongated; a few principal ribs seiTated ; 



ears unequal. In var. rubidtis, Hds. (non Mart.), the ribs are equal, not 

 serrated. 



159. Pecten (Pvar.) Hindsii. Broader; ribs close, small, smooth, bifurcating. 



Passes from hastatus towards Islandims. 



160. Pecten aquisidcatus, ? n. s. Thinner and flatter than vmtricosus,-vA\ib. nan-ower 



ribs. 



161. Pecten paucicostatus, ? n. s. Somewhat resembling very young caurinus ; but 



ribs fewer, stronger. 



162. Pecten latiauritus, Conr. (pars). Ribs sharply defined, vrith sharp concentric 



laminse. Possibly an extreme form of 

 162b.Pecten monotimeris, Conx. = ttinica, ThiL+laiiatiriitis, Conr. pars. Passes into 

 Amusium. Very slanting, thin, with faint ribs. 



163. Amusium caurinum, Gld. E. E. Large, flat, thin, very inequivalve. Var. = 



Yessoensis, Jay. Japan. 



164. Janira dentata, Sby. = excavata, Val. Ven. Like media. From the Gulf fauna. 



Beach-20 fm. Cp. 



Family Spondylidce. 

 .65. Hinnites giganteus. Gray, AnaXyst. = Poulsoni, Conr. Very large, Spondyloid: 

 ligament as in Pedum, strongly adherent along the ears. 



Family Ostreidce. 

 66. Ostrea lurida, ti. s. Shape of cA As : texture dull, luiid, olivaceous, with purple 

 stains. 2-3 fm. on mud flats, Zoi-d. 



131 



