156 BRITISH MOLLUSKS. 



spire is immersed. It has only been collected in the sonth of 

 Ireland. The ouly other species of Avn/phipeplea at present known 

 are three of fine dimensions, collected respectively at the island 

 of Luzon, Philippines, and in the vicinities of Moreton Bay and of 

 Melbourne, Australia. 



The animal of Lymncea varies in colour and marking. Some- 

 times the body is speckled with dusky sometimes with opake-white 

 dots ; the mantle is generally cloudedly reticulated. L. stagnalis 

 and limosa, as observed in the vivarium, are decidedly carnivorous. 

 Mr. Jones, the active Secretary of the Cotteswold Club, informs me 

 that he has frequently given them dead bleak and other small fish, 

 which they have reduced to a skeleton in a very short time, although 

 abundance of vegetable food was at hand. 



The British species of Lymncea are : — 



1. limosa. Shell obliquely ovate, of four whorls, of which the 



last is ventricosely inflated. 



2. auricularia. Shell squarely semiglobose, of three to four 



whorls, of which the last is very largely widely expanded. 



3. stagnalis. Shell ovately turreted, with the spire acuminately 



produced, of five to six whorls, of which the last is globosely 

 inflated. 



4. palustris. Shell oblong-ovate, rather solid, of five to six 



whorls, rough grey, fuscous red in the interior. 



5. truncatula. Shell smaller, acuminately ovate, rather solid. 



of five to six roughly striated whorls. 



6. glabra. Shell small, elongately turreted, with a subcylin- 



drical spire, of eight rather closely convoluted smooth silky 

 whorls. 



7. glutinosa. Shell globosely ovate, extremely thin and trans- 



parent, of only three whorls, having the columellar lip largely 

 membranaceously reflected over the body whorl. 



8. involuta. Shell subtruncately oval, extremely thin and trans- 



parent, with the spire immersed, of three to four whorls, 

 having the columellar lip largely membranaceously reflected 

 over the body whorl. 



