72 CALIFOENIA ACADEMY OP SCIENCES. 



MOLLUSCA 95 



CLASS V. PELECYPODA 95 



Order Peioxodesmacea 95 



SUPERFAMILY NUCULACEA 95 



Family VI. Nuculidce 95 



Genus Nucula Lamarck 95 



Subgenus Acila H. & A. Adams 95 



11. (A.) castrensis Hinds 95 



Subgenus Nucula, s.s 96 



12. (N.) suprastriata Carpenter 96 



Family Via. LedidcB 96 



Genus Leda Schumacher 96 



13. fossa Baird 96 



14. hamata Carpenter 97 



15. minuta Fabr., var. pr.iienrsor, var. uov 97 



16. taphria Dall 98 



Genus Yoldia Moller 99 



17. cooperi Gabb 99 



IS. scissurata Dall 99 



SUPERFAMILY ARCACEA 100 



Famihi VII. Arcidai 100 



Suhfamily Pedunculina: 100 



Genus Glycj'meris Da Costa 100 



19. barbarensis Conrad 100 



20. septentrionalis Middendorf 101 



Subfamily Arcince 101 



Genus Area (Linne) Lamarck 101 



21. labiata Sowerby 101 



SUPERFAMILY OSTRACEA 102 



Family VIII. Ostreida: 102 



Genus Ostrea (Linne) Lamarck 102 



22. lurida Carpenter 102 



SUPERFAMILY PECTINACEA ICS 



Family IX. Peciinidie 103 



Genus Pecten Muller 103 



Subgenus Pecten, «. s 103 



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



23. (P.) dentatus Sowerby 104 



[S. D.] (P.) hemphilli Dali 105 



24. (P.) stearnsii Dall 106 



Subgenus Chlamys BolI'en 107 



Section Patinopecteu Dall 107 



25. (P.) caurinus GonLD 107 



[S. D.] (P.) expansus Dall 108 



Sectfon Nodipecten Dall 108 



26. (N.) subnodosus Sowerby 108 



Section Chlamys, s. s 109 



27. (C.) hastatus Sowerby 109 



28. (C.) hericeus Gould 110 



29. (C.) hericeus var. strategus Dali ; 110 



.30. (C.) jcirdani, sp. nov Ill 



31. (C.) latiauritus Conrad Ill 



32. (0.) 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.) uewsomi, sp. uov 113 



[S. D.] (P.) subvcntricosus Dali 114 



35. (P.) veiitricosus Sowkkby 114 



Subgenus Hinnites De France 115 



36. (H.) gigauteus Gray 115 



