36. Tellina 



37. Tellina 



38. Macoma edulis, Nutt. 



39. Macoma inconapicua, D. ft Sby. 



40. Macoma nasuta, Conr. 



41. Macoma secta, Conr. 



42. Scrobicularia alta, Conr. 



43. Strigilla carnaria, Linn. 



44. Semele decisa, Conr. 



45. Semele rubrolineata, Conr. 



46. Cumingia californica, Conr. 



Donacidae. 



47. Donax californicus, Conr. 



48. Donax flexuosus, Gld. 



49. Arcopagia vicina, C. B. Ad. 



Mactridae. 



50. Mactra californica, Conr. 



51. Mactra falcata, Gld. 



52. Mactra planulata, Conr. 



Veiieridae. 



53. Trigona crassatelloides, Conr. 



54. ?Trigona tantUla, Gld. 



55. Dione callosa, Conr. 



56. Venus californiensis, Sby. 



57. Venus dispar. 



58. Venus excavata, Cpr. 



59. Venus fluctifraga, Sby. 



60. Venus Nuttallii, Conr. 



61. Venus 



62. Tapes gracilis, Gld. 



63. Tapes Petitii, Desk. 



64. Tapes rigida, Gld. 



65. Tapes staminea, Conr. 



Petricolidae. 



66. Petricola californica, Conr. 



67. Rupellaria lamellifera, Conr. 



68. Saxidomus aratus, Gld. 



69. Saxidomus Nuttallii, Conr. 



Astartidae. 



70. Astarte 



71. Trapezium californicum, Conr. 



72. Cardita ventricosa, Gld. 



Chamidae. 



73. Chama exogyra, Conr. 



74. Chama pellucida, Rve. 



Cardiadae. 



75. Cardium californiense, Desk. 



76. Cardium (like grcenlandicum). 



77. Cardium luteolabrum, Gld. 



78. Cardium Nuttalli, Conr. 



79. Cardium quadragenariurn, Con 



80. Cardium substriatum, Conr. 



Lucinidae. 



81. Lucina bella, Conr. 



82. Lucina californica, Conr. 



83. Lucina Nuttallii, Conr. 



84. Lucina 



85. Cryptodon 



Diplodontidae. 



86. Diplodonta orbella, Gld. 



Kelliadae. 



87. Kellia Laperousii, Desk. 



88. Kellia [rugifera], 



89. Kellia suborbicularis, Mont. 



90. Lasea 



1)1. Montacuta 



Mytilidae. 



92. Mytilus californianus, Conr 



93. Mytilus edulis, Linn. 



94. Mytilus glomeratus, Gld. 



95. Septifer 



96. Modiola capax, Conr. 



97. Modiola elongata, Swains. 



98. Modiola flabellata, Gld. 



99. Modiola modiolus, Linn. 



100. Modiola nitens, Cpr. 



101. Modiola recta, Conr. 



102. Modiola 



103. Crenella [like discrepansj. 



104. Lithophagus falcatus, Gld. 



105. Lithophagus 



ArcadaB. 



106. Area labiata, Sby. 



107. Area ?multicostata, Sby. 



108. Byssoarca pernoides, Cpr. 



109. Axinaea septentrionalis, M. 



JVuculidae. 



110. Nucula caelata, Hds. 



111. Nucula ?tenuis, Mont. 



112. Leda ?caudata, Mont. 



113. Leda 



114. Yoldia 



115. Yoldia 



Pectinidae. 



116. Pecten Fabricii, Phil. 



117. Pecten hericius, Gld. 



118. Pecten (like Islandicus). 



119. Pecten latiauratus, Conr. 



120. Pecten ?nodosus, Linn. 



121. Pecten purpuratus, Lam. 



122. Pecten ?ventricosus, Sby. 



123. Amusium caurinum, Gld. 



124. Janeira florida,*//tfs. 



125. Hinnites giganteus, Gray. 



Ostraeidae. 



126. Ostrea conchaphila, Cpr. 



127. Ostrea [lurida]. 



128. Ostrea rufa, Gld. 



Anomiadae. 



129. Placunanomia alope, Gray. 



