GO^GRYLIA—DITHYRA. 24. 77 



This well inarkcd genus, exclusively the discovery of Montagu, is 

 respectfully dedicated to the learned Dr. Goodall, the Provost of 

 Eton. 



GooDALLiA margine interno denticulato. triangularis. 



Shell with the inner margin toothed. 



Tab. nost. 6, fig. 14. 

 Mactra triangularis. Montagu, Test. Brit. p. 99, tab. 3, fig. 5 



Pennant, Brit. Zool. iv. p. 195. 



Linn. Trans, viii. p. 72. 



Turton, British Fauna, p. 155. 



Dillwyn, Descript. Catal. p. 143. 



Turton, Conch. Diet. p. 82. 

 Mus. nost. Western coasts, and Ireland. 



Shell two lines long and three broad, strong, smooth, white or 

 brown, a little produced on one side, with the beaks very prominent ; 

 inside white but not much glossed, and strongly toothed on the mar- 

 gin : in one valve a large cloven tooth ; in the other two small teeth 

 with a triangular cavity between them. 



GooDALLiA margine interno integerrimo. " 

 Shell with the inner margin quite entire. 



Tab. nost. 6, fig. 10. 

 Mactra minutissima. Montagu, Test. Brit. Suppl. p. 37. 



Pennant, Brit. Zool. iv. p 197. 



Dillwyn, Descript. Catal. p 143. 



Turton, Conch. Diet. p. 83. 

 Mus. nost. From Cornwall. 



mmutissima. 

 2. 



