80 CONCHY LI A—JDITJUYR A. 26. 



The teeth are flattened at the surface wheie tney meet toge 

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

 supported by a short lateral rib : and there is no transverse car- 

 dinal process. 



Novaciiia. SoLEN testd rectit, dentibus conicis ohtusis suharcttatis. 



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

 Solen Novacula. 3lQntagu, Test. Brit. p. 47. 



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



Jjinn. Trans, viii. p. 44. 



Turton, British Fauna, p. 148. 



Wood, Conch, p. 119. 



Dillwyn, Descript. Catal. p. 58. 



Turton, Conch. Diet. p. 159. 



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

 except 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. 



'X='X' Valvd alterd hidentaiu, 3-6. 

 With two teeth in one of the valves. 



siiiqut. Solen testd rectd, valvd alterd dente conico fiastato-acuminaio, 

 alterd bidentatd. 

 Shell straight, in one valve a single spear-shaped tooth ending 

 in a sharp point, and two in the other. 



