EXPLANATION OF PLATES. 441 



59, 60. Gervillia (Bakewellia) antiqua, Munst. Permian ; 



England, 2t9 



Plate 131. 



61. Avicula heteroptera, Lam. Australia, . . . 2t0 



62. Avicula crocea, Lam. Philippines, .... 270 



63. Avicula (Meleagrina) margaritifera, Linn. L. Cal., . 211 



64. Perna ephippium, Linn. West Indies, . . . 277 



65. Crenatula viridis, Lam. ^. China Sea, . . . 278 



66. Yulsella rugosa, Lam. Red Sea, .... 280 



67. Pinna rudis, Linn. W. Indies, 283 



68. Pinna (Atrina) saccata, Linn. Sandwich Islands, . 283 



69. Plicatula ramosa, Linn. West Indies, . . . 284 



70. Pedum spondjdoideum, Gmelin. ^. Red Sea, . . 285 



71. 73. Spond3dus regius, Linn. ^. Socio Isles, . . 285 



72. Spondylus Americanus, Lam. West Indies, . . 285 



74. Malleus vulgaris, Linu. China Sea, . . . .281 



75. Anomia (^5^]nigma) senigmatica, Chemn, . Philippines, 293 



76. Placunanomia macroschisma, Desh. N. Pacific, . . 294 



77. Placunanomia (Pododesmus) rudis, Brod W. Indies, 294 



78. Placuna (Placenta) sella, Gmel. {. China, . . 29B 



79. Ostrea (Alectryonia) frons, Linn. W. Indies, . . 298 



Plate 132. 



80. 81. Dimya Deshayesiana, Rouault. Eocene; Pan, . 281 

 82-84. Nayadina Heberti,Munier-Chalmas. Cret.; France, 2*^1 

 85-87. Eligmus polytypus, Desl. Jurassic ; Normandy, . 282 



88. Pinna (Trichites) undatus, Lycett. Oolite; England, 283 



89. Pinna (Aviculopinna) prisca, Munst. Permian; Eur., 284 



90. Grervillia anceps, Desh. ^. Neocomian ; England, . 279 



91. 92. Lima squamosa, Lam. China, . . . . 286 



93. Lima (Limatula) bullata, Born. Australia, . . 287 



94. Lima (Limea) Sarsii, Loven. Norway, . . . 287 



95. Lima (Ctenoides) scabra. Born. W. Indies, , . 287 



96. Lima (Mantellum) inflata, Chemn. Mediterranean, . 288 



97. Lima (Acesta) excavata, Chejnn. Norway, . . 288 



98. Lima (Plagiostoma) Cardiiformis, Sowb. Bath Oolite; 



England, 288 



99. Pecten (Vola) atavus, d'Orb. Cret. ; Eur., . . . 2S0 

 100,1. Pecten (Neithea) sequicostatus, Lam. Cret. ; Eur., . 290 



2. Carolia placunoides, Cantr. Tertiary ; Egypt, • . . 295 



3. Ostrea (Exogyra) Humboldtii, Fischer. Cret.; Russia, 298 



4. Ostrea (Gryphsea) angulata. Lam., .... 288 



5. Aviculopecten granosus, Sowb., ..... 291 



6. Pernopecten glaber, Hall. Devon. ; N. Y., . . . 291 



