C 17 3 
FIG XXL 
This is a full grown, fhell of the laft, it differ¬ 
ing only in fize; being fometimes found eight 
inches and a half long. 
Found v^ith Fig. 20. 
This is perhaps the large bivalve found by 
Woodward* “ on the ploughed lands, in Wefton 
fields, about a mile from Bath. There were, 
as ufual ill the' fe^, other leffer Ihells, feeming 
to be of Balani, affixed to it.'* 
FIG. XXII. 
Oblong oval: about one third of the Ihells 
fmooth, the remainder ridged from the beaks to 
the margin. 
M Y T I L U S. 
I have named tkefe three Jhelh Mujfels, from their 
refemblance in habit to fome of the recent ones; as the 
principal charaBer the hinge which difingui/he's recent 
fiells, cannot be feen in fojfilfiells^ 
B 
* Catalogue of foflils. Tom, II. p. 94, c. 1, 
FIG, 
