438 



STRATIGKAPHICAL GEOLOGY 



d 



Fig. 147. GROUP OF PURBECK KOSSILS 



a. Mantellia nidiformis. 

 l>. Mantellia microphylla. 

 e. Ostrea distorts. 

 </. Physa Bristpvi. 

 r. Cyrena media. 

 /. Unio compressus. 



!t. Plenrosternon ovatum (carapace). 

 h. Goniopholis crassidens (tooth). 

 '(. Cyrena elongata. 

 7,-. Bupreston stygnus (elytron). 

 1. ArchiBOniscus Bdwardsi. 

 m. Aspidorhynclius Fischeri. 



Fossils of the Kimcridgian 



Brachiopoda. Orbiculoidea latissima, Liugula ovalis, Rhynchonella 

 inconstans. 



