CONTENTS. XI 



PAGE 



Fam. V. ProductidcB. — Prodiicta, Aulosteges, Stro- 



phalosia, Clionetes 233 



Fam. VI. CraniadcB. — Crania 235 



Fam. VII. LiscinidcB. — Discina, Siplionotreta 237 



Fam. VIII. lingulldce. — Lingula, Obolus 238 



Class V. Conchifera 240 



Section A. Asiphonida 253 



Fam. I. Ostreidce. — Ostrea, Anomia, Placima, Pecten, 



Lima, Spondylus, Pedum, Piicatula 253 



Fam. II, Aviculidce. — Avicula, Posidoiiomya, Avi- 



culo-pecten, Gervillia, Perna, Inoceramus, Pinna ... 260 

 Fam. III. Mytilida. — Mytilus, Myalina, Modiola, 



Lithodomus, Crenella, Dreissena 26-1 



Fam. IV, Arcadce. — Area, Cueullaea, Pectunculus, 



Limopsis, Nucula, Isoarca, Leda, Solenella, Solemya 267 

 Fam. V. Trigoniada. — Trigonia, Myoplioria, Axinns, 



Lyrodesma 271 



Fam. VI. JJnionid(B. — Unio, Castalia, Anodon, 



Iridina, Myeetopus, ^Etheria, Miilleria 273 



Section B. Siphoxida; Integro-paliialia 276 



Fam. VII. CJiamidcB. — Cliama, Monopleura, Diceras, 



Eequienia 276 



Fam. VIII. RljppuritidcB. — Ilippm-ites, Eadiolites, 



Caprinella, Caprina, Caprotina 279 



Fam. IX. Tridacnida. — Tridacna, Hippopus 229 



Fam. A. Cardiadce. — Cardium, Hemicardium, Li- 



thoeardium, Serripes, Adacna, Conocardium 290 



Fam. XI. Lucinida. — Lueina, Cryptodon, Corbis, 



Tancredia, Diplodonta, Ungulina, Kellia, Monta- 



CLita, Lepton, Galeomma 292 



