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CASH: FOSSIL MOLLUSCA. 
SILURIAN. 
Cephalopoda. — Orthoceras, Cyrtoceras, Lituites, Troc- 
hoceras. 
Gastropoda. — Bellerophon, Murchisonia, Holopella, Turbo. 
Lamellibranchiata. — Cardiola, Pterinea, Orthoneta. 
CARBONIFEROUS. 
Cephalopoda. — Orthoceras, Actinoceras, Phragmoceras, 
Nautilus, Goniatites, Poterioceras. 
Gastropoda. — Bellerophon, Porcellia, Buccinum (?), Natica 
Loxonema, Macrocheilus, Phanerotinus, Cirrus, Euomphalus, 
Platyschisma, Pleurotomaria, Murchisonia, Cerithium, Melania(?), 
Turritella, Pileopsis, Acroculia, Capulus (?), Turbo, Trochus, 
Patella, Dentalium, Metoptoma. 
Lamellibranchiata. — Corbula, Cardiomorpha, Myacites, 
Lutraria (?), Sang-uinolites, Pullastra (?), Cypricardia, Edmondia, 
Conocardium, Artemis (?), Lucina, Cardinia, Anthracosia, Mytilus, 
Modiola, Avicula, A viculopecten, Gervillia, Inoceramus, Pinna, 
Posidonomya, Ptermea, Area (?), Cuculloea, Nucula, Leda, 
Leptodomus, Pecten, Ctenodonta. 
PERMIAN. 
Cephalopoda. — Nautilus. 
Gastropoda. — Natica, Chemnitzia, Straparollus, Rissoa^ 
Turritella, Turbo, Dentalium, Chiton. 
Lamellibranchiata. — Cardiomorpha, Mytilus,Myoconcha, 
Gervillia, Bakewellia, Axinus, ( = Schizodus), Monotis, Myalina, 
Macrodon, Leda. 
JURASSIC. 
Cephalopoda. — Teuthopsis, Beloteuthis, Geoteuthis, 
Belemnites (Ammonites = Amaltheus, Lytoceras, Phylloceras, 
Harpoceras, Stephanoceras, Ag-oceras, Arietites, &c.), Nautilus. 
Gastropoda. — Murex, Purpuroidea, Natica, Nerinea, 
Actjeonina, Cjdindrites, Chemnitzia, Eulima, Discohelix, Cirrus (?), 
