EXPLANATION OF PLATES. 317 



I'IG. Fam. Myaria. 



69. Anatina rostrata. Auriscalpium, Megerle. 



70. Anatinella Sibbaldii. 



71. Mya truncata. 



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



binge, (from Blainville.) 



73. Myocbama anomioides ; lower valve witb clavicle, and binge of 



upper valve. 



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



75. Cleidotbserus Cbamoides, attached valve. 



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

 Lyonsia, 491, 492. 

 Nseara, 493-5. 

 Turtonia, fig. 567. 

 Poronia, fig. 568. 

 KeUia, fig. 569. . 

 Montacuta, fig. 570. > ^o be added to this family. 



Pythina, fig. 571. 

 Syndosmya, fig. 572. 

 Cochlodesme, fig. 573. 

 Myodora, fig. 574. 



Fam. Mactracea. 



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

 78. Solenoides. CuteHus ? 



79. Mactra Stultorum. 



80. pHcataria. Spisula ? G-ray. 



81. Spengleri. Schizodesma, Gray. 



82. bicolor. Mulinia, Gray. 



83. Gnathodon cuneatus. Clathodon, Conrad. 



84. Crassatella rostrata. 



85. Ampbidesma reticulatum. 



86. Erycina plebeja. Mesodesma, Desh. 



87. Cumingia mutica. 



88. Fngulina transversa, (from Sowerby's genera.) 

 Abra, fig. 495. 

 Ervilia, fig. 497. 



i To be added to this family. 



