LIMN^A. 35 



Var. IV. albina. Milk white. 



Genus III. 



1. L. GLUTINOSA (glutinous). 



Oval, globular, very thin and glossy, transparent, pale 

 amber or greyish horn-colour, here and there striated in 

 the line of growth, and faintly, but closely, striated 

 spirally ; whorls three to four, tumid ; spire slightly pro- 

 duced; suture deepish ; mouth nearly oval, contracted above. 



This is a very local species, though abundant where 

 it occurs. It is found in the home and eastern counties ; 

 also in Lake Windermere, Henley-on-Thames, Lake 

 Bala, &c. 



Var. mucronata. Spire produced. 



2. L. INVOLTJTA ([spire"] enveloped [by whorls']). 



Oval, very thin, glossy, transparent, pale amber ; whorls 

 three to four, convex ; spire sunk ; apex distinct ; mouth 

 pear-shaped. 



This is a beautiful delicately-formed shell, and it 

 is to be regretted that it is only found in a small lake 

 on the Cromlaun Mountain at Killarney. It is pro- 

 bably a variety of L. peregra. 



3. L. PEEEGEA (wandering). 

 Obliquely ovate, thin, moderately glossy, semi-trans- 



