explanation of plates, 431 



Plate 116, 



PIGITRB, PAGB. 



68, 69, Cj'pricardia rostrata, Lam. Australia, . . .190 



70. Cardium costatum, Liini. China, . . . .193 



71. Cardium (Bucardium) ringens, Chemn. Gambia, . 193 

 72-74. Cardium (Traclij'Cardium) muricatum, Linn. W. I., 193 



75. Cardium (Acantliocardia) aculeatum, Linn. Europe, . 193 



76. Cardium (Cerastoderma) edule, Linn. Europe, . . 193 



77. Cardium (Papja-idea) liiulca. Reeve. Hab. ? . . 193 



78. Cardium (Fuivia) bullata, Linn. West Indies, . .193 

 79-81. Aphrodita Groenlandica, Cliemu. Greenland, , 194 



82. LiBvicardium (Protocardium) lyratum, Sowb. Mada- 



gascar, . . . . . . . . . 194 



83. L8evicardium serratum, Linn. AYest Indies, . .194 



84. Adacna edentulum, Pallas. Caspian Sea, . . . 194 



85. Adacna (Monodacna) Caspicum,Eichw. Caspian Sea, 195 



86. Adacna{Didacna)Donaciformis,Scliroeter. Philippines, 195 



87. Hemicardium cardissa, Linn. Philippines, . . .195 



88. Hemicardium hemicardium, Linn. Philippines, . .195 



89. Hemicardium (Fragum) unedo, Linn. Philippines, 195 



90. 91. Hemicardium (Ctenocardia) hystrix, Linn. Phil- 



ippines, . . .195 



92, Hemicardium (Lunulicardia) retusa, Linn, China, . 195 



93, Conocardium aliforme, Sowb, Carboniferous ; Ireland, 195 



94. Cardiola cornucopise, Goldfuss Palaeozoic ; Europe, 258 



95. Cardiopsis radiata, Meek and Worthen. Carbonifer- 



ous ; Ills., 196 



98. Chama lazarus, Linn. Mauritius, . . . .198 



99. Chama (Arcinella) arcinella, Linn. West Indies, . 198 



Plate 117. 



100. Conocardium Hibernicum, Sowb. Carboniferous ; 



Ireland, 195 



1. Lithocardium aviculare. Lam. Eocene; Paris Basin, . 196 

 2 Monopleura Urgonensis, Matheron. Cret. ; Europe, . 198 

 3, 4, Animal of Chama. 3. Right side, with the umbonal 

 portion of the mantle removed. 4. Left side, showing 

 the relative extent of the liver and ovarium, a, a, 

 adductors ; m, pallial line ; e, excurrent orifice ; 6, 

 branchial ; /, foot and pedal orifice ; p, posterior 

 pedal muscle ; t, palpi ; gr, gills (contracted); Z, liver ; 

 o, ovarium ; d, dental lobes. . . . 

 5,6. Diceras arietinum, Lam. Coral oolite ; France, . 199 

 7. Diceras. Internal cast, a, point of attachment ; c, c, 

 casts of dental pits ; t, t, furrows produced by spiral 

 ridges, . . ? . . S . " ! . 199 



