CASH: FOSSIL MOLLUSCA. 
79 
Aucyloceras ... 
Cretaceous. 
Crioceias 
Helicoceras 
Orthoceras 
Silurian, Carboniferous 
Actinoceras 
Carboniferous 
Cyrtoceras 
Silurian 
Phrag"moceras ... 
Carboniferous 
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and Cretaceous 
Litiiites 
Silurian 
Trochocera^* 
Silurian 
G(miatites 
Carboniferous 
Poterioceras ... 
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YORKSHIRE FOSSIL GASTERO?Oi)A (Genera). 
jjeiieropnoii 
... ailurian, Uarboniterous 
r OrCcJllct 
... V ai Doniierous 
lYiUItJX • . ... 
... O 111 OihblL 
irupiKHi •.. 
.. JT lfc?lt>LO0fc!Ilti 
Fu>us ... .. 
PIpistOPPTlP 
rieuroLuiiid 
"P 1 £i 1 ci" 11 O 
... xloisLOOoUc 
Buccinuni 
Carboniferous, (?) Pleistocene 
Purpura 
Pleistocene 
Purpuroidea 
Jurassic 
Columbella 
Pleistocene 
Natica... 
Carboniferous, Permian, Jurassic. 
and Pleistocene 
Scalaria 
Pleistocene 
Nerinea 
J urassic 
Avellana 
Cretaceous 
Actseonina 
Jurassic 
Cylindrites 
Jurassic 
(Jhemnitzia 
Permian. Jurassic 
Loxonema 
Carboniferous 
Macro cheilus 
j> 
Eulima 
Jurassic 
Solarium 
Cretaceous 
Discohelix 
Jurassic 
Phanerotinus 
Carboniferous 
Cirrus... 
„ Jurassic (?) 
Euomphalus 
Platyschisma 
Carboniferous 
Pleurotomaria . . . 
Jurassic, Cretaceoub 
Murchisonia . ' ... 
Silurian, Carboniferous 
