COT^CaYLlk^niTHlRA, 16. 58 



Amphidesma testa ovato^trigond, valvd alierd denticulo fisso *«»"€• 



et dentibus lateralihus. 

 Shell oval-triangular, with a cloven denticle and lateral teeth in 



one of the valves. 

 Mactra tenuis. Montagu, Test, pw 572, tab. 17, fig. 7. 



Pennant, Brit. Zool. iv. p. 19i. 



Linn. Trans, viii. p. 72. 



Turton, British Fauna, p. \55. 



Dorset Catal. p. 33. 



Dillwyn, Descript. Catal. p. 142. 



Turton, Conch. Diet. p. 84. 

 Mus. nost. Devon, Dorset, and Hampshire coasts. 



Shell a quarter of an inch long, and rather more broad, flat, 

 thin, glossy white, with the beaks central. 



Amphidesma testa ovato-trigond, valvd altera denticulis duobus Boys«. 



et dentibus lateralibus. 

 Shell oval-triangular, with two denticles and lateral teeth in one 

 of the valves. 



Tab, nost. 5. fig. 4 and 5. 

 Mactra Boysii. Montagit, Test. Brit. p. 98, tab. 3, fig. 7. 

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

 Linn. Trans, viii. p. 72, tab 1, fig. 12, 

 Turton, British Fauna, p. 155. 

 Dorset CataL p. 33, tab. 1 2, fig. 7. . 

 Dillwyn, Descript. Catal. p. 143., 

 Turton, Conch. Diet. p. 84... 



