IXVKRTKKRATK FOSSILS. 19 



CRETArKOUS MOLLUSCA. 



A check list of the cretaceous species described 

 or mentioned in '' Palaeontology," Vol. I, Avas pub- 

 lished some years since by Mr. Gabb. The present 

 list contains the additional names published in Vol. 

 II, including several from near Arivechi, Sonora, 

 Mex. These may yet be found in Arizona, as most 

 of them are in Texas. 



To avoid confusion, the numbers commence with 

 2000. To correspond with the Catalogue in Vol. 

 II, the order followed with the living and tertiary 

 species is here reversed. 



I. Dosciibed in Vol. I under another name. M. Mexico. 



2000 Ptiloleuthis foliatus Gahb. 

 2004 Nautilus Campbellii Mtck. 



