i'2 CAUFOUNIA ACADEMY OF SCIENCES. 



MOLLUSCA 05 



CLASS V. I'ELECYPODA 95 



UKUKR rKlO.NOKEMUikrKA 95 



HUPKUFA MIL Y NUCULACE.i 95 



Family \'l . Nuculitlit 95 



(ienu« Niiciiln Lauarck 95 



Subgeuiig Acila H. k A. Adamr 95 



11. (A.) cnstroiisis Hinds 95 



Sabgoiius Nuciiln, ». » 96 



12. (N.) Kuprostriutu Carpknter 96 



Family V In. htdiilit 96 



ri>iiiiH Loilii Schumacher 96 



l.S. fossn Baird 96 



14. bamiila Carpenter 97 



15. miuiitn Fabr., var. priecursor, var. uov 97 



16. tapliria Dai.l 98 



Genus Yoldia Mollkr 99 



17. cooperi Gabb 99 



18. 8cissurnta Dall 99 



SUPERFA MIL Y A RCACKA 100 



Family V 1 1 . Arcidm 100 



Subfamily Pedunculina: 100 



Geuus Glycymcris Da Costa 100 



19. barbaroiigis Conrad 100 



20. septeutrionalis Middendorf 101 



Suhfamily Arcince 101 



GenuB Area (Lisne) Lamarck 101 



21. labiftta Sowf-RBY 101 



SUPERFA MIL Y OSTRACEA 102 



Family Vlll. Ostreida 102 



Genns Ostrea (Linnk) Lamarck 102 



22. Inrida Carpenter 102 



SUPERFAM/LY PECT/NACEA 103 



Family IX. Pectinida 10.3 



Genus Peefen Mcller 10.3 



Subgenus Pecten, s. « 103 



[S. B.] (P.) bcUus Conrad 103 



23. (P.) deutatus Sowerbv 104 



[S. D.] (P.) bemphilli Dali, 105 



24. (P.) stearnsii Dali 106 



Subgenus Chlamys Bolten 107 



Section Patinopecteu Dall 107 



25. (P.) cauriuus Godlu 107 



[S. D.] (P.) expansus Dali, 108 



Section Nodipecten Dall 108 



26. (N.) subnodosus Sowerby 108 



Section Cblamye, n. s 109 



27. (C.) hastatus Sowerby 109 



28. (C.) hericeus Gocld 110 



29. (C.) hericeus var. strategus Dall 110 



30. (C.) jordaui, sp. noT Ill 



31. (C.) latiauritns Conrad Ill 



32. (C.) latiauritus Cone., var. fragilis, var. nov 112 



33. (C.) latiauritus CoNR., var. niouotimeris Conrad 112 



[S. D.] (C.) opuntia Dall 113 



Section Plagioctenium Dall 113 



.34. (P.) newsomi, sp. nov 113 



• [S. D.] (P.) subventricosus Dall 114 



35. (P.) ventricosus Sowerby 1 14 



Subgenus Uiunites De France 115 



36. (H.) giganteus Gray 115 



