392 Mr. Jeffreys on the Testaceous <^c. Mollusca. 



LiMNEUS TINCTUS, p. 378. 



Is the young of a small variety of communis ; but so very 

 dissimilar in its form from that shell, that I could not, till 

 after a careful examination, and comparison of a series of 

 specimens of both species, be brought to unite them. 



XIX. On 



