90 



Faujas St. Ford, (Hist. Nat. de Maestricht, t. 24, f. 1) 

 as a Gryphite. It appears to be a species common to the 

 green Sand and the strata between it and the Chalk, 

 and will serve to identify that range ^ while tlie O. gre- 

 garea, which is a less curved and much more irregular 

 shell, distinguishes the Pisolite. 



