30. Potamomya trigonalis, C. B. A. 82. 



31. Corbula bicarinata, Shy. 83. 



32. Corbula biradiata, Shy. 84. 



33. Corbula Boivinei. 85. 



34. Corbula fragilis, lids. 86. 



35. Corbula marmorata, lids. 87. 



36. Corbula nasuta, Sbij. 88. 



37. Corbula nuciformis, Shy. 89. 

 SS. Corbula obesa, lids. 90. 



39. Corbula ovulata, Shy. 91, 



40. Corbula pustulosa, Cpr. 92. 



41. Corbula radiata. 93. 



42. Corbula rubra, C. B. Ad. 94. 



43. Corbula speciosa, Hds. 95. 



44. Corbula tenuis, Shy. 96. 



45. Corbula ventricosa, Rve. 97. 



Auatiuidae. 98. 



46. Thracia squamosa, CpT. 99. 



47. Tyleria fragilis, //. <|- A. Ad. 100. 



48. Lyonsia diaphana, Cpr. 101. 



49. Lyonsia picta, Sby. 102. 



50. Periploma alta, C. B. Ad. 103. 



51. Periploma excurvata, Cpr. 104. 



52. Periploma Leana, Com. 105. 



53. Periploma papyracea, Cpr. 106. 



54. Periploma planiusoula, Sby. 107. 



55. Neaera costata, Hds. 108. 



56. Neaera didyma, lids. 109. 



57. Pandora brevifrons. 110. 



58. Pandora claviculata, Cpr. 111. 

 69. Pandora cornuta, C. B. Ad. 112. 



Soleiiiilae. 113. 



60. Solen rudis, C. B. Ad. 114. 



Soleciirtidae. 115. 



61. Solecurtus affinis, C. B. Ad. 116. 



62. Solecurtus politus, Cpr. 117. 



63. Solecurtus violascens, Cpr. 118. 



64. Sanguinolaria miniata, GId. 119. 



65. Sanguinolaria tellinoides. Ad. 120. 



66. Psammobia Kindermanni, PA//. 121. 



67. Tellina brevirostris. Desk. 122. 



68. Tellina Broderipii, Desk. 123. 



69. Tellina cognata, C. B. Ad. 124. 



70. Tellina columbiensis, Hani. 125. 



71. Tellina crystallina, Chemn. 126. 



72. Tellina Cumingii, Hani. 127. 



73. Tellina delicatula. Desk. 128. 



74. Tellina denticulata. Desk. 129. 



75. Tellina Deshayesii, Cpr. 130. 



76. Tellina donacilla, Cpr. 131. 



77. Tellina eburnea, llanl. 132. 



78. Tellina fausta, Donov. 



79. Tellina felix, Hani. 133. 



80. Tellina gemma, GId. 134. 



81. Tellina hiberna, Hani. 135. 



Tellina insculpta, Hani. 

 Tellina laceridens, Hani. 

 Tellina lamellata, Cpr. 

 Tellina panamensis. 

 Tellina princeps, Hani. 

 Tellina prora, Hani. 

 Tellina puella, C. B. Ad. 

 Tellina punicea. Bom. 

 Tellina pura, GId. 

 Tellina regia, Hani. 

 Tellina regularis, Cpr. 

 Tellina rhodora, Hani 

 Tellina rubescens, Hani. 

 Tellina rufescens, Chemn. 

 Tellina siliqua, C. B. Ad. 

 Tellina straminea. Desk. 

 Tellina virgo, Hani. 

 Macoma aurora, Hani. 

 Macoma concinna, C. B. Ad. 

 Macoma Dombeyi, Hani. 

 Macoma elongata, Hani. 

 Macoma gubernaculum, Hani 

 Macoma mazatlanica, Desli. 

 Macoma petalum, Val. 

 Macoma plebeia, Hani. 

 Macoma tersa, Gld. 

 Strigilla carnaria, Linn. 

 Strigilla dichotoma, Phil. 

 Strigilla disjuncta, Cpr. 

 Strigilla ervilia, Phil. 

 Strigilla lenticula, Phil. 

 Strigilla sincera, Hani. 

 Tellidora Burneti, Brod. ^- Shy. 

 ?Scrobicularia producta, Cpr. 

 ?Scrobicularia viriditincta, C 

 Semele bicolor, C. B. Ad.. 

 Semele californica, A. Ad. 

 Semele elliptica, Sby. 

 Semele flavescens, Gld. 

 Semele obliqua. Wood. 

 Semele planata. 

 Semele proxima, C. B. Ad. 

 Semele pulchra, Sby. 

 Semele striosa, C. B. Ad. 

 Semele tortuosa, C. B. Ad. 

 Semele ventricosa, C. B. Ad. 

 Semele ?yenusta, -1. Ad. 

 Cumingia californica, Conr. 

 Cumingia lamellosa, Shy. 

 Cumingia trigonularis, Sby. 

 Cumingia 



Doiiacidae. 

 Iphigenia altior, Sby. 

 Iphigenia laevigata, Gmel. 

 Arcopagia vicina, C. B. Ad. 



