EXPLANATION OF PLATES. 29? 



FIG. 



Fam My aria. 



69. Anatina rostrata. Auriscalpium, Megerle. 



70. Anatinella Sibbaldii. 



71. Mya truncata. 



72. Periploma insequivalvis. Osteodesma, Desh. a, bone of the 



hinge, (from Blainville.) 



73. Myochama anomioides ; lower valve with clavicle , and hinge of 



upper valve. 



74. External view of the same, attached to a Trigonia. 



75. Cleidotheerus Chamoides, attached valve, 



76. Upper valve of the same, with the clavicle. 



Fam. Mactracea. 



77 • Lutraria papyracea. Ligula, Leach. Carinella, Adans. 



78. — Solenoides. Cutellus ? 



79. Mactra Stultorum. 



80. plicataria. Spisula ? Gray. 



81. Spengleri. Schizodesma, Gray. 



$2. bicolor. Mulinia, Gr y. 



83. Gnathodon cuneatus. Clathodon, Conrad. 



84. Crassatella rostrata. 



85. Amphidesma reticulatum. 



86. Erycina plebeja. Mesodesma, Desh. 



87. Cuming mutica. 



88. Ungulina transversa, (from Sowerby's genera. 



Fam. Corbulacea. 



89. Corbula nucleus . 



90. Pandora rostrata 



Fam. Lithophagidse. 



91. Petricola Roccellaria. 



92. Carditoidea. Coralliophaga, Bl. 



93. Thracia corbuloides. 



94. Saxicava rugosa. 



95. Hiatella biaperta. 



