PLATES. 



NAIADES. CAMACEiE. CJORBULACE^E. MYTILACEiE. 



Fig. 52- Iridina exotica. 



53. Anodonta, 



a. b. the two hinges. 



54. Hyria avicularis. 

 a. b. the two hinges. 



55. Unio. 



a. the hinge of the opposite 

 valve. 



56. Dicer as arietina. 



57. Corbula. 



58. Pandora rostrata.' 



59. Etheria elliptica. 



a. the hinge of the opposite 

 valve. 



Fig. 60. Chartia. 



a. inner view of the opposite 

 valve. 



61. * Productus punctatus. 



62. * longispinus. 



63. * -- aculeatus. 



64. Modiola. 



a. inner view of the opposite 

 valve. 



65. Lithodomus. ("Modiola li- 

 ihophaga.) 



, a. the hinge. 



66. Mytilus. 



67. Pinna pec.tinata. 



68 . * My li hides labiatus . 



MALLEACEiE. PECTINIDES. 



Fig. 69. Crenatula nigrina. 



70. Avicula crocea. 



7 1 . Meleagrina margaritifera . 



72. Perna femoralis. 



73. Malleus vulgaris. 



74. * Inoceramus concentricus . 

 a ¥ . profile of ditto. 



75. * Inoceramus sulcatus. 



76. Plicatula reniformis. 



a. inner view of the opposite 

 valve. 



b. the second hinge, 



Fig. 77. Spondylus ducalis. 

 a. b. the two hinges. 



78. Pedum spondyloideum. 



79. Lima injlata. 



80. Pecien varius. 



a. b. the two hinges. 



8 1 . Podopsis gryphoides . 

 a. inner view of ditto. 



82. * Plagiostoma cardiiformis. 



83 . * Hippopodium ponderosum . 



