122 
SPECIFIC 
PLATE IV. 
Fig. 1. Hinge of Mya truncata. 
Fig. 2. Mya tr uncat a. 
Shell ovate, truncate on the posterior margin, 
tooth of the hinge projecting forwards and very 
blunt. 
Lister Conch. Tab. 428. Fig. 269. 
Specimen dirty white, clothed with a yellowish 
brown epidermis, which extends beyond the trun- 
cate side ; thick, convex, deeply marked with ir- 
regular, transverse striae, gaping widely at the 
truncated end, very smooth within. Solitary broad 
tooth of the hinge connected with the opposite 
valve by an interior cartilage. 
Inhabits the English coast. 
Fig. 3. Hinge of Solen Vagina. 
Fig. 4. Solen Ensis. 
Shell linear, rather curved ; hinge with two 
teeth in one valve, and one locking between them 
in the other. 
Lister Conch. Tab. 411. Fig. 257. 
