OF CONCHOLOGY. 105 



a Summit, ee cicatrix, ggg teeth 

 of the hinge, n the inside. 



PLATE II. 



BIVALTE SHELLS. 



Fig. 1st. — SOLEN ANTIQUA- 

 TUS. Shell thin, white, and sub- 

 pellucid ; moderately glossy, with 

 concentric stria? ; ends rounded and 

 gaping ; hinge near the centre, fur- 

 nished with a single tooth in one valve 

 looking in between two in the oppo- 

 site, the teeth are erect, oblique, and 

 stand beyond the margin ; outside 

 covered with an umber-coloured epi- 

 dermis. Found on the Cornwall and 

 Dorsetshire coasts, &c. 



Linn. Trans, vol. viii. page 46. 



/The cartilage, n inside, jj margin 

 or limb, q hinge. 



