GUPPY" — EDIBLE MOLLUSKA. 
31 
In my paper on the Tertiary Microzoic Rocks of Trim a 
I referred parenthetically to a question that had more t an once 
been put to me as to the nature and origin of the shells oun 
scattered over the surface of the soil in Naparima and ot er pai s 
of Trinidad. These are generally recent shells an av « , n0 
connexion with the formations on which they are founc . 1 ' 
luska taken on or near the shore have been came, up 
country for food and the shells have been thrown about. In 
few cases fossil shells are found on the surface, but this occurs 
only where there is some exposure of a shell-bearing stratum and 
although in a few instances this happens the most common ong‘ 
of the shell-heaps and scattered shells found here and there 
throughout the country is that I have indicated. 
Specimens of the dentition of various mollusks were exhibited 
under microscope; also specimens of the molluska mentioned 
in the paper as used for food. 
