g6 



in one valve broad, bifurcated, angulated clofe to tlic 

 beak ; lateral teeth not very remote. Infide giolTy white, 

 moderately concave ; margin plain, edge fliarp. 



Doctor PuLTENEY firft noticed this fpecies as a Britijh 

 fliell : it was found by Mr. Bryer at Weymouth. 



We have feen fpecimens rather larger than that men- 

 tioned by the Do6lor, faid to be found on the fame coaft. 

 Lensfth one inch ; breadth one and a half. 



From the circumffance of this fiiell not chafing at one 

 end, there can be very little doubt but it is the MaElra 

 pellucida of Chemnitz, and not the J'ragilis as fome have 

 thought; indeed the defcription and figure given by him 

 anfwers perfe6tly well. 



5. 



Compress A. Madlra compreffa. Pull. Cat. Dorfct. p. 31. 



Trigonella plana. Da Cofta. p. 200. t. 13. f. 1. I. 



Venus borealis. Br. Zool. No. 52. 



Mactra Liftcri. Gw/t7. p.3261. 26. — Turt X/;;. iv. p.213. 

 Liji. Con. t.253. {.S3.— Id. A/ig. t.4.f 23. 



Tellina borealis. Don. Br. Shelh. ii. t. 64. f. 1. 



?vl. wit.h a flat, thin, femi-pellucid, fub oval, fub-tri- 

 angulated fnell : of a yellowiih-white colour ; fomeiimes 

 Iiglit ferruginous, and often blackifli, or banded with thefe 

 colours, occafioned by the foil it is found in : is rather 

 wrmkled irregularly than Ilriated, and not gloffy : umbo 



fmall. 



