161 



Stir ce nombre cinquante-deux paraissent speciales a cet 

 horizon ; six ont deja ete signalees dans le Trias et vingt-six 

 continuent a se propager dans I'lnfra-Lias proprement dit. 

 Les autres sont douteuses. 



Fig. I. General Section of Garden Cliff, near 

 Westbury-on-Severn. 



Base of the 

 Ostrea Series. 



Grey Marls 

 Series. 



f'S'l^T'^^ 



...Shales. 

 Ostrea bed, Ostrea liasica, Modiola minima, 

 Myacites, &c. 



J — Grey Marl. 



•Ochreous Marl. 



..„Grey MarL 



Estheria Bed. 

 ::::.Clay. 



Limestone fossiliferous, Myophoria, Cardium, 

 Axinits. 



Grey Marl, with conchoidal fracture. 



^ Grey Marl, with conchoidal fracture. 



Pullastra, Cardium, Avicula contorta. 

 Pecten Valoniensis. 

 Pullastra, Cardijim, Avicula mntorta. 

 Pecten Valoniensis. 



Pullastra, Cardium. 



Cardium Shales. 



Avicula contorta, Modiola psilonoti. 



Bone-bed, pyritic. 



Pullastra Sandstone. 

 Pullastra Sandstone. 



iiissiizsiz^^TzizTz^r^ New Red Marls. 



