80 CONCHYLIA— D/rnra^. 25. 



The teeth are flattened at the surface where they meet toge- 

 ther when closed, and rounded in the circumference, each of them 

 supjDorted by a short lateral rib : and there is no transverse cardinal 

 process. 



Nov;>cul:i. SoLEN testa recta, dentihus conicis obtusis subarcuatis. 



Shell straight, with the teeth conic obtuse and slightly curved. 

 Solen Novacula. Montagu, Test. Brit. p. 47- 



Pennant, Brit. Zool. iv. p. 172. 

 Linn. Trans, viii. p. 44. 

 Turton, British Fauna, p. 148. 

 Wood, Conch, j). 119. 

 Dillwyn, Descript. Catal. p. 58. 

 Turton, Conch. Diet, p. 159. 



A very doubtful species, said to resemble the Solen Siliqua, ex- 

 cept in having a single tooth in each valve, and wanting the rib-like 

 appendages under the teeth. 



Some small specimens, answering to the above character, were 

 presented to us as having been collected at the North Bull, in 

 Dublin bay. 



** Valvd altera bidentatd. 3-6. 

 With two teeth in one of the valves. 



Siliqua. Solen testa recta, valvd alterd dente conico hastato-acuminato, altera 



3. 



bidentatd. 



