ox MOLLUSCA OF THE WEST COAST OP NORTH AMERICA. 



645 



152. Yoldia lanceolata, J. Sby. Hani. = arctica, Brod. & Sby. (Not Adratta I., Lam. 



G. Sby.) With ant. diajronal lines. 

 163. Yoldia amyffdala, var. teste Hani. Like lanceolata, without posterior wing, 



and anterior sculpture. 



Family ? Trigoniada. 



154. Verticordia ornata, 'D'OTh. = novfmcostata, Xdi.k^ve, Samarang. Exactly 



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



Family Avicididte. 



155. Bryophila setom, n. g.,n. s., Ann. X. H. 1804, p. 10. Like minute, broad Pinna. 



Animal ovoviviparous. Sta Barbara, 20 fm. Cp. 



Family Pectinidee. 

 150. Lima orientali.%, Ad. & Eve., Samaran^r, in Mus. Cum. = dehiscens, Conr. fos.«il, 

 teste Cp. ^'ery close to voung of L. hians, var. tenera. Beach to 20 fm. c. Cp. 



157. Limatida sid>aiiiivvlata, Mont. Fbs. & Hani. Circumboreal. Fossil in Crag. 



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



158. Pecten hastati(s,^hy. = hericetis,(}\d. Elongated; a few principal ribs serrated : 



ears unequal. In var. rubidm, Hds. (non Mart.), the ribs aie equal, not 

 serrated. 



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



Passes from hastatvs towards Islandiatx. 



100. Pecten eequistdcattis, ? n. s. Thinner and flatter than ventricosus, with narrower 



ribs. 



101. Pecten paucicostattts, ? n. s. Somewhat resembling veiy young caurinus ; but 



ribs fewer, stronger. 



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



laminae. Possibly an extreme form of 

 \^2b. Pecten tnonotifneris, Conr. = tunica, Fhil. -\-latiai(rittis, Conr. pars. Passes into 

 Amusium. Very slanting, tliin, with faint ribs. 



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



Yessoensis, Jay. Japan. 

 IG4. Jaiiira dentata, Shy. = ea:cavata,\&\.\en. hike media. From the Gulf fauna. 



Beach-20 fm. Cp. 



Family Spondylidee. 

 .Sjo. Hinnites giganteus, Gray, Analvst. = Pouhoni, Com-. Very large, Spondyloid : 



ligament as in Pedum, strongly adherent along the ears. 



66. 



Ostrea lurida, n. 8. 

 stains. 2-3 fm. 



Family Ostreidte. 



Shape of edidis : texture dull, Imid, olivaceous, with purple 

 on mud flats, Lord. 



131 



