posidono- 

 my;nbed. 



28 



D. Brauniamum 



C. mucronatum Per. 



D. arumlatuni acanthopse 



C. crassum | 



D. Holandrei Peronoceras 



C. Desplacei subarmatum 

 Dactylioceras commune 



Spinatus- 



BED. 



MARGARITA- 



tusbed. Deroceros 



Zitteli 



D. Davoei 



D. Venarense 



C. ceutaurum 

 Coaloceras pettos 



Amatusbed, 



Deroceras armatum 



Eabicosta- 



TUSBED. 



OXYXOTTTS- 

 BED. 



C. ^geon 

 C. Actseon 

 C.Maugenestii 

 C. bipunctatui 

 C. natrix 



D. submuticum 



P. brevispinum 

 D. nodogigas 



D. densinodum 



Obtususbed 



Deroceras Dudressieri 



Arnioc 

 miserabile 



D. Dudresieri, Birchii. 



