206 NORTH STAFFORDSHIRE COAL FOSSILS. 



Euomphalus, sp. : rare : roof of Gin mine coal. 

 Loxomma, sp. : rare : roof of Gin mine coal. 

 Macrocheilus (Phillips) : rare : roof of Bay coal, Longton. 

 NaticopsiSj sp. : rare : roof of Gin mine coal. 

 Platyschisma, sp. : rare : roof of Gin mine. 

 Pleurotomaria, sp. : rare : roof of Gin mine coal. 



Cephalopoda. This, the highest class of Mollusca, is re- 

 presented by four genera and about twenty species. Of 

 these, Goniatites are the commonest. This genus is not 

 rare in the lower measures. The highest range in which 

 we have found it is the roof of the Bay coal, in which 

 bed it is of small size. The Yoredale shales are rich in 

 several species of this genus. Good specimens of G. bilinguis 

 have been collected from these beds at Cellarhead, during 

 the sinking of a shaft in a fruitless attempt to reach the 

 Froghall Hrematite. Of the genus Orthoceras, there are 

 several species not yet identified. 



CEPHALOPODA. 



Goniatites Looneyi. (Phil.) : rare : roof of Bay coal, Longton. 

 G. Listeri (Mait.) : Yoredale shales, Cellarhead ; 

 Bay coal, Longton. G. Gibsoni. (Sow.) : Felt House, 

 near Leek. G. bilinguis (Salter) : Yoredale shales, 

 Cellarhead. G. excavatus (Phil.) : Yoredale shales, 

 Tittesworth Reservoir. G. obtusus : Yoredale shales. 

 G. reticulata (Phil.) : Yoredale shales. G. striatus 

 (Sow.) : Yoredale shales. G. truncata (Phil.) : Yore- 



