38. Cynthia vittata, Stm. 



39. Cynthia echinata, Lin. 



40. Cynthia complanata, 0. Fabr. 



41. Cynthia gutta, Stm. 



42. Cynthia monocera, Moll. 



43. Cynthia conchilega, Mull. 



44. Glandula glutinans, Moll. 



45. Glandula mollis, Stm. 



46. Glandula fibrosa, Stm. 



47. Molgula arenata, Stm. 



48. Molgula sordida, St7n. 



49. Molgula producta, Stm. 



50. Ascidia manhattensis, DeKay. 



51. Ascidia tenella, Stm. 



52. Ascidia lurida, Moll. 



53. Ascidia callosa, Ston. [Sow. 



54. Chelysoma Macleayana, .Br. # 



55. Chelysoma geometrica, S/m. 



56. Pelonaia arenifera, Stm. 



PAIXIOBRAtfCHIATA. 



57. Lingula pyramidata, Stm. 



58. Rhynchonella psittacea, Gm. 



59. Terebratella labradorensis, 



Sow. 



60. Waldheimia cranium, Mull. 



61. Terebratulina septentrionalis, 



LAMELLIBRANCHIATA. 



62. Anomia ephippium, Lin. 



63. Anomia aculeata, Gm. 



64. Ostrea virginiana, Lister. 



65. Ostrea borealis, Lam. 



66. Ostrea triangularis, Holmes. 



67. Ostrea fundata, Soy. 



68. Oatrea equestris, Say. 



69. Ostrea semicylindrica, Say. 



70. Plicatula barbadensls, Petiv. 



71. Lima sulculus, Leach. 



72. Lima scabra, Z?orn. 



73. Pecten tenuicostatus, Migh. 



74. Pecten islandicus, Ch. 



75. Pecten fuscus, Gould. 



76. Pecten nodosus, Lin. 



77. Pecten dislocatus, Say. 



78. Pecten irradians, Lam. 



79. Pecten groenlandicus, Sow. 



80. Axinaea charlestonensis,//oZw. 

 Area Holmesii, Kurtz. 



Area pexata, Say. 



Area americana, Gray. 



Area caelata, Con. 

 85. Area trans versa, Say. 

 66. Area glacialis, Gray. 

 87. Area lienosa, Say. 



81. 

 82. 

 83. 



84. 



88. Area noae, Lin. 



89. Area ponderosa, Say. 



90. Area incongrua, Say. 



91. Nucula inflata, //anc. 



92. Nucula expaiisa, Reeve. 



93. Nucula tenuis, Mont. 



94. Nucula delphinodonta, Migh. 



95. Nucula proxima, Say. 



96. Yoldia pygmaea, Muenst. 



97. Yoldia arctica, Gray. 



98. Yoldia sulcifera, Reeve. 



99. Yoldia siliqua, Reeve. 



100. Yoldia thraciformis, Storer. 



101. Yoldia sapotilla, Gou/d. 



102. Yoldia limatula, Say. 



103. Yoldia myalis, Couth. 



104. Leda buccata, Moll. 



105. Leda tenuisulcata, Couth. 



106. Leda minuta, 3/#. 



107. Leda acuta, Con. 



108. Pinna squamosissima, Phil. 



109. Pinna carolinensis, Hani. 



110. Avicula atlantica, Lam. 



111. Lithophagus arista tus, Sol. 



112. Dacrydium vitreum, Afo//. 



113. Crenella glandula, Tott. 



114. Crenella pectinula, Gould. 



115. Modiolaria nigra, Gray. 



116. Modiolaria substriata, Gray. 



117. Modiolaria laevigata, Gray. 



118. Modiolaria discors, Lin. 



119. Modiolaria corrugata, Stm. 



120. Modiolaria lateralis, Say. 



121. Modiola carolinensis, Con. 



122. Modiola plicatula, Zawi. 



123. Modiola vulgaris, Fleming. 



124. Modiola americana, Leach. 



125. Modiola castanea, Say. 



126. Mytilus edulis, Lin. 



127. Mytilus cubitus, Say. 



128. Dreissena leucopheata, Con. 



129. Chama macrophylla, Chemn. 



130. Chama arcinella, Lin. 



131. Cardium elegantulum, Moll. 



132. Cardium magnum, Born. 



133. Cardium isocardia, Zw. 



134. Cardium muricatum, Lin. 



135. Cardium pinnulatum, Con. 



136. Cardium islandicum, Lin. 



137. Liocardium serratum, Zin 



138. Liocardium Mortoni, Con. 



139. Serripes groenlandicus, Ch. 



140. Lucina contracta, Say. 



141. Lucina crenulata, Con. 



142. Lucina radians, Cow. 



10 



