ON MOLLUSCA OF THE WEST COAST OP NORTH AMERICA. 



645 



152. Yoldia hnceolata, J. Sby. Hani. = «rc<tca, Brod. & Sby. Qiiot Adrana Z.,Lam. 



G. Sby.) With ant. diagonal lines. 



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



and anterior sculpture. 



Family ? Trigoniadce. 



154. Fe?'</(?o;-(7/a orwa/a, D'Orb. = More?«cos/rtte, Ad. & Rve. Samarang. Exactly 



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



Family Avicidida. 



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



Animal ovoTiviparous. Sta Barbara, 20 fm. Cp. 



Family Pectinida. 



156. Li7na orientalis. Ad. & Rve., Samarang, in Mus. Cum.= deJiiscens, Conr. fossil, 



teste Cp. Very close to young of Z. hians, var. ienera. Beach to 20 fm. c. Cp. 



157. Limatida svhavricvlata, Mont. Fbs. & Hani. Circumboreal. Fossil in Crag. 



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



158. Pecten hastatus, Sby. = hericeus, Gld. Elongated ; a few principal ribs serrated ; 



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

 seiTated. 



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



Passes from hastatus towards Islandicns. 



160. Pecten cequisulcatus, ? n. s. Thinner and flatter than ventricosiis, with naiTOwer 



ribs. 

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

 ribs fewer, stronger. 



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



laminae. Possibly an extreme fonn of 

 lQ2b. Pecten monotimeris, Conr. = tttnica, Fhil. -\-latiauritus, Conr. pars. Passes into 

 Amusimn. Very slanting, thin, vdth faint ribs. 



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



Yessoensis, Jay. Japan. 



164. Janira dentata, Shj. = excavata,Yal.Yen. Like media. From the Gulf fauna. 



Beach-20 fm. Cp. 



Family Spondylidce. 

 ..65. Hinnites giganteus, Gray, Analyst. = Po?^/sr)»i', Conr. Very large, Spondyloid: 

 ligament as in Pedum, stronglj' adherent along the ears. 



Family Ostreidce. 

 66. Ostrea lurida, n. s. Shape of edidis : texture dull, lurid, olivaceous, with puqile 

 stains. 2-3 fm. on mud flats, Zord. 



131 



