CASH: FOSSIL MOLLUSCA, 
79 
Ancyloceras 
Cretaceous. 
Crioceras 
... J ^ 
Helicoceras 
... 
Silurian Carlinnifprnns 
Orthoceras 
Actinoceras 
Carboniferous 
Cyrtoceras 
Silurian 
Phrag-moceras ... 
Carboniferous 
Nautilus 
Carboniferous, Permian, Jurassic 
and Cretaceous 
Lituites 
Silurian 
Trochoceras 
Silurian 
Goniatites 
Carboniferous 
Poterioceras 
,j 
YORKSHIRE FOSSIL GASTEROPOi)A (Geneea). 
Bellerophon 
Silurian, Carboniferous 
Porcellia 
(;arboniferous 
Murex 
Jurassic 
Trophon 
Pleistocene 
Fu.-us... 
Pleistocene 
Pleurotoma 
Pleistocene 
Buccinum 
Carboniferous, (?) Pleistocene 
Purpura 
Pleistocene 
Purpuroidea 
Jurassic 
Columbella 
Pleistocene 
Natica,.. 
Carl)oniferous, Permian, Jurassic, 
and Pleistocene 
Scalaria 
Pleistocene 
Nerinea 
Jurassic 
Avellana 
Cretaceous 
Acteeonina 
Jurassic 
Cylindrites 
Jurassic 
(jhemnitzia 
Permian. Jurassic 
Loxonema 
Carboniferous 
Macrocheilus 
Eulima 
Jurassic 
Solarium 
Cretaceous 
Discohelix 
Jurassic 
Phanerotinus 
Carboniferous 
Cirrus... 
,, Jurassic (?) 
Euomphalus 
Platyschisma 
Carboniferous 
Pleurotomaria . . . 
Jurassic, Cretaceoub 
Murchisonia 
Silurian, Carboniferous 
