Number of 

 Species col- 

 lected in 

 each Divi- 

 fion. 



50 Mr. Martin'j Account of fome Specks of Foffll Anomrar. 



An Attempt towards an Arrangement offuch Anomia* as have been 



collected in Derbyjhire. 



I. Imperforate; 



Or thofe which have no vifible hole or perforation in either 

 valve. 



* with one valve gibbous, the other flat or concave. 



hinge rounded, or not on k a ftraight line. Fig, 9 



hinge on a ftraight line. Fig. 10 



'-— with both valves convex. 



hinge rounded, or not on a ftraight line. 



margins even. Fig. 8 

 margins waved. Fig. 7 



Perforate ; 



Or thofe in which one of the valves is pierced with a hole. 



■ -r with both valves convex. 



« hinge not on a ftraight line. 



the beak of the larger or under valve 



pierced'through like a tube. Fig. 3. 1 



a triangular aperture between the beak 



of the larger valve and hinge. Fig. 4 



— hinge on a ftraight line. 



with a triangular aperture under the 



beak of the larger valve. Fig. 2. 5 

 with the upper valve perforated. Fig. 6 



3 

 3 



4 

 6 



4 



1 



I have at prefent no more to offer on thefe fubjetts. At fome 

 future period I fhali be happy in having permiffion to Jay before 

 the Society fetches of the other Am*** remaining in my hands, 

 winch are judged to be non-defcript. 



V. EJfay 



