ARNOLD — THE PALEONTOLOGY AND STRATIGRAPHY OF SAN PEDRO. 73 



MOLLUSCA (Continued.) 



Family X. Limidce 1 15 



Genus Lima (BRuouifiRE) Cuvieb 115 



Subgenus Lima, s. .« 115 



Section Mautelhim Adams 115 



37. (M.) (iehiseeus Conrad 1 16 



SUPERFAMIhY ANo.UlACEA 116 



Family X I. A noiniidiK 116 



Genus Pododesmus PiilLim 116 



Section Mouia Gray 116 



38. (M. ) maerosohisma Dksuayes 116 



Genus Auomia Linn£ 117 



39. lampe Gray 117 



[S. D.] liraatula Dai.l 118 



SUPKRFAMILY MYTILACEA 118 



Family XII . Mylilidie 118 



Genus Mytilus (Linne) Bolten 118 



Section Mytilus, s. s 118 



40. (M.) edulis LiNNiS 118 



Genus Septifer Recloz 119 



41. bifurcatns Reeve 119 



Genus Modiolus Lamarck 120 



Section Modiolus, s. s 120 



42. (M.) fornicatus Carpenter 120 



43. (M.) rectus CoNKAD 120 



Genus Lithophaga Bolten 121 



4-t. plumula Hanley 121 



Order Anomalouesmacea 121 



SUPERFAMIL Y ANA TINACEA •. 121 



Family XIII. Periplomidce 121 



Genus Periploma Schumacher 121 



45. argentaria Conrad 121 



Family XI V. Thraciida: 122 



Genus Thracia (Leach) Blainville 122 



46. trapezoides Conrad 122 



Family X V. Pandoridie 123 



Genus Pandora 123 



Subgenus Kennerlia Carpenter 123 



47. (K.) bicarinata Carpenter 123 



48. (K.) filosa Carpenter 124 



Genus Clidiophora Carpenter 124 



49. punctata Conrad 124 



Family X VI. Lyonsiidte 125 



Genus Lyonsia Turton 125 



50. californica Conrad 125 



Genus Mytilimeria Conhad 125 



51. uuttalli Conrad 126 



SUPERFAMILY POROMYACEA 126 



Family X VII. Verlicordiidie 126 



Genus Verticordia S. Wood 126 



52. novemcostata Adams & Reeve 126 



Order Tkleodesmacea 127 



SUPKRFAMILY ASTARTAOEA 127 



Family X VIII. Asfarlidie 127 



Genus Astiirte Sowerby 127 



Subgenus Crassinella Bayi.e 127 



53. (C.) brauueri, sp. nov 127 



SUPERFAMILY CARDITACEA 128 



Family XIX. Cardilidm 128 



( 10 ) June 11, 1903. 



