ARNOLD — THE PALEONTOLOGY AND STRATIGRAPHY OF SAN PEDRO. 73 



MOLLUSCA (Continued.) 



Family X . L imidff 1 15 



Genus Lima (BRuouiftRE) Covier 115 



Subgenus Lima, s. s 115 



Section Mantellum Adam.s 115 



37. (M.) dehiscens Conrad 116 



SUPERFAMILY ANOiUACEA 116 



Family XI. Anomiidce 116 



Genus Pododesmus Philippi 116 



Section Mouia Gray 1 16 



38. (M.) macroschisma Desha yes 116 



Genus Anemia Linne 117 



39. lampe Gray 117 



[S. D.] limatula Dall 118 



SUPERFAMILY MYTILACEA 118 



Family XII . Mylilitke 118 



Genus Mytilus (Linne) Bolten 118 



Section Mytilus, s. s 118 



40. (M.) edulis Linn^ 118 



Genus Septifer Eeci.uz 119 



41. bifurcatus Eeeve 119 



Genus Modiolus Lamarck 120 



Section Modiolus, s. s 120 



42. (M.) foruicatus Carpenter 120 



43. (M.) rectus Conrad 120 



Genus Lithophaga Bolten 121 



44. plumula Hanley 121 



Order Anomalodesmacea 121 



SUPERFAMILY ANA TINACEA 121 



Family XIII. Periplomida 121 



Genus Periploma Schumacher 121 



45. argentaria Conrad 121 



Family XI V. Thraciidw 122 



Genus Thraoia (Leach) Blainvillb 122 



46. trapezoides Conrad 122 



Family X V. Pandoridce 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. LyoiuiidiB 125 



Genus Lyonsia Tcrton 125 



50. californica Conrad 125 



Genus Mytilimeria Conrad 125 



51. nuttalli Conrad 126 



SUPERFAMILY POROMYACEA 126 



Family X VII. Verlicordiida 1-° 



Genus Verticordia S. Wood 126 



52. novemcostata Adams & Reeve 126 



Order Teleodesmacea "' 



SUPERFAMILY ASTARTACEA 127 



Family X VI! I. Astarlidie 1^7 



Genus Astarte Sowerby 12' 



Subgenus Crassinella Bayle 127 



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



SUPERFAMILY CARDITACEA 128 



Family XIX. Carditidoe 128 



jg June 11, 1903. 



