TO GEOLOGY. %39 
FAMILY SOLENACEA. 
GENUS SOLECURTUS. Bluinville. 
S. Blainvilli. Plate 1. Fig. 7. 
Description. Shell trapezoidal, rather compressed, nearly 
equilateral, transversely and minutely striate, truncate be- 
hind; beaks very small; escutcheon long and deeply im- 
pressed; teeth two, the anterior one large and erect, the 
posterior small and oblique; margin entire. 
Diam’... . . Length .8, Breadth 1.3, inches. 
Observations. M. de Blainville has with great propriety 
divided the genus Solen, placing those with the teeth nearly 
medial under the generic name of Solecurtis. Several of 
Lamarck’s fossil Solenes fall under this division. One spe- 
cies of the true Solen (S. affinis, Sowerby) is found in the 
London Clay. The present species resembles most the 
strigilatus (Lamarck), but differs in being more compressed 
and less gaping. 
Mr Sowerby (Mineral. Conch. Tab. 462) represents a 
shell very similar to this in form and size, under the 
name Sanguinolaria compressa. In the description the 
teeth are not mentioned. I should suppose from an ex- 
amination of the figure that it was a true Solecurtus. 
Mr S. says it belongs strictly to Azor of Leach. 
I have great gratification in dedicating this species to 
