53 



6i. Atrina rigida Dillwyn. 



62. Atrina serrata Sowerby. 



63. Ostrea virginica Gmelin. 



64. Pecten exasperatus Sower- 

 by. 



65. Pecten ornatus Lamarck. 



66. Pecten gibbus Linne. 



67. Pecten gibbus var. disloca- 

 tus Say. 



68. Pecten gibbus var. irradians 

 Lamarck. 



69. Spondylus echinatus Mar- 

 ty n. 



70. Anomia simplex Orbigny. 



71. Modiolus demissus Dillwyn. 



72. Cardita domingensis Or- 

 bigny. 



73. Cardita Horidana Conrad. 



74. V enericardia tridentata Say. 



75. V enericardia perplana Con- 

 rad. 



76. Cyrena Horidana Conrad. 



77. Cyrena caroliniana Bosc. 



78. Sportella constricta Conrad. 



79. Codakia orbicularis Linne. 



80. Lucina chrysostoma Phil- 

 ippi. 



81. Phacoides pectinatus Gme- 

 lin. 



82. Phacoides muricatus Speng- 

 ler. 



83. Phacoides multilineatus 

 Tuomey and Holmes. 



84. Phacoides Horidana Conrad. 



85. Phacoides nassula Conrad. 



86. Cardium isocardia Linne. 



87. Cardium robustum Solan- 

 der. 



88. Cardium muricatum Linne. 



89. Cardium spinosum var. 

 spinosum Meuchen. 



90. 

 91. 

 92. 



93- 

 94. 



95- 

 96. 



97- 

 98. 



99. 

 100. 



101. 



102. 



103. 



104. 

 105. 

 106. 

 107. 

 108. 

 109. 

 no. 



III. 



112. 



ii3- 



114. 



ii5- 

 116. 



117. 



118. 

 119. 



Cardium serratum Linne. 

 Cardium Mortoni Conrad. 

 Montacuta Horidana Dall. 

 Diplodanta punctata Say. 

 Dosinia discus Reeve. 

 Dosinia elegans Conrad. 

 Transennella Conradina 

 Dall. 



Transennella caloosana 

 Dall 



Macro colli sir a nimbosa So- 

 lander. 



Chione cancellata Linne. 

 Anomalocardia caloosana 

 Dall. 



A n m alocardia bras iliana 

 Gmelin. 



Venus campechiensis Gme- 

 lin. 



Parastarte triquetra Con- 

 rad. 



An gulus versicolor Cozzens. 

 Angulits sybariticus Dall. 

 Tellina umbra Dall. 

 Tagelus gibbus Spengler. 

 Tagclus divisus Spengler. 

 Donax variabilis Say. 

 Gemma gemma var. pur- 

 purea Lea. 



Labiosa canalicnlata Say. 

 Rangia cuneata Gray. 

 Mulinia lateralis Say. 

 Mulinia lateralis var. cor- 

 buloides Reeve. 

 Ervilia concentric a Gould. 

 Congeria lencophaeata Con- 

 rad. 



Pholas campechiensis Gme- 

 lin. 



Barnea costata Linne. 

 Gastrochaena cuneiformis 

 Spengler. 



