OLIVA. 



in the London Clay^ in the Calcaire grossiere^ and in a kind 

 of green sand, probably the debris of Volcanic rocks, near 

 Turin. 



The Olives are marine ; their animal is unknown ; we 

 think with Lamarck, that its mantle is extensible over the 

 whole shell ; he is of opinion that it is carnivorous. 



Fig. 1 OUva Porphyria, commonly called the Camp Olive. 



2 Maura. 



3 snhulata. 



4 CUwula, a fossil species, from Bordeaux. 



