458 LAMELLIBRANCHIATA. 



Family Aviculid^. — Actinodesma, Avicula, Aviculopinna, Bakevellia, Ecte- 



nodesma, Glyptodesma, Inoceramus, Liopteria, Leptodesma, Limoptera, 



Monopteria, Monotis, Palaeopinna, Posidonomya, Pseudomonotis, Pteroni- 



tella, Pteronites. 

 Family AviculopectenidjE. — Aviculopecten, Crenipecten, Euchondria, Ly- 



riopecten, Pernopecten, Pterinopecten, Streblopteria. 

 Family Cardiid^e. — Cardiola, Cardiopsis, Cardium, Dexiobia, Glyptocardia, 



Lunulicardium, Palseocardia, Panenka, Paracardiura, Pararca. 

 Family Cardiomorphid^e. — Cardiomorpha, Edmondia, Euthydesraa, Pro- 



tomya. 

 Family Ch^nocardiid^:. — Chsenocardia. 

 Family Conocardiid^e. — Conocardium. 

 Family Cyprinil\<e. — Astartella, Cardinia, Clidophorus, Cypricardia, Cypri- 



cardites, Matheria, Pleurophorus, Vanuxemia. 

 Family Cytherodontidje. — Cytherodon, Lyrodesma, Schizodus. 

 Family Eopteriid.e. — Eopteria, Euchasma. 

 Family GRAMMYSiiDiE. — Allorisma, Chsenomya, Cuneamya, Grammysia, Lep- 



todomus, Sedgwickia. 

 Family Lucinidje. — Paracylas. 

 Family MoDiOMORPHiDiE. — Amnigenia, Cypricardella, Elymella, Goniophora, 



Glossites, Modiomorpha. 

 Family Myacid^e. — Anthracomya. 

 Family Mytilid^e. — Anthracoptera, Gosselettia, Lithophaga, Megambonia, 



Modiella, Modiolopsis, Myalina, Mytilarca, Mytilops, Plethomytilus, 



Pyanomya. 

 Family Nuculid^e. — Nucula, Nuculana, Nuculites, Palseoneilo, Pyrenomoeus, 



Solenomya, Tellinomya, Yoldia. 

 Family Nyassid-s:. — Nyassa. 

 Family Orthonotilve. — Orthodesma, Orthonota, Orthonotella, Palseosolen, 



Sphenolium. 

 Family Ostreidje. — Ostrea, Placunopsis. 

 Family Pal^eanatinid^e. — Ilionia, Palaeanatina, Prorhynchus. 

 Family Pal^eoconchid^e. — Palseoconcha. 

 Family Pholadellid^e. — Cimitaria, Pholadella, Phthonia*. 

 Family Pinnid^e. — Pin Da. 

 Family Prothyrid^e. — Prothyris. 



Family Pterinhd.e. — Actinopteria, Pterinea, Ptychopteria, Vertumnia. 

 Family Sanguinolitid^e. — Cypricardinia, Promacrus, Spathella, Sphenotus, 



Sanguinolites. 

 Family Solenid^e. — Solenopsis. 

 Family Spirodomid^e.— Spirodomus. 

 Family TechnophoriDjE. — Technophorus. 

 Family Tellinid^e. — Tellinopsis. 

 Family Trigoniid;e. — Dolabra, ? Ischyrinia. ? 

 Family Unionid^e. — Anthracosia, Prisconaia. 



