50 CORBIS. LUCINA. CAPSA. CYCLAS. 



" There is but one species of TelUnides from 

 the island of Timor. The genus Coiirls is fos- 

 sil, with one exception, Corhls Jimhrlaia^ from 

 the Indian Ocean. Lucina is a pretty genus of 

 shells. L. caniaria is frequently found in col- 

 lections. The interior of the valves is of a deep 

 red colour: the muscular impressions are very 

 distant from each other ; one is greatly lengthened 

 out ; the valves delicately striated. Capsa is 

 taken, you perceive, from Don ax. 



" Tellina is found fossil on the borders of the 

 Red Sea, also in the county of York. OfDonaa- 

 and Mactra the fossil species are few. 



" In the third section of this order we find six 

 families. 1st. CoucIkb^ which are of two kinds, 

 fluviatic, living in fresh-waters ; and marine, or 

 living in the sea. Of the first are, 



Cyclas, taken from Tellina. 



Cyrene^ partly from Tellina and Venus. 



Galathea, Venus paradoxa^ (one species.) 



*' Cyclas rivicola (Plate 9) will give you 

 an idea of this genus : it is Tellina cornea of 

 Linnaeus. The species are very common in 

 lakes, rivers, and ponds : it abounds in river- 

 sand, from which you may often procure perfect 

 specimens. Lamarck observes that it is rare in 

 France ; but appears common in the Thames. 



