PLATE CLXXV. 



obvious on the firft wreath. The shell is likewise more uniformly 

 elongated than H. stagnalis, the first wreajh being less swollen, or 

 vcntricose, and the remainder more so, than in that shell. — Helix 

 fragilis we have found on plants growing in rivulets about Green- 

 wich. Dr. Pultney says, it is common on plants in the river Stour. 



FIG. II. 

 HELIX FONTINALIS. 



SMOOTH FRESH WATER SNAIL. 

 SPECIFIC CHARACTER. 



Shell imperforate, ovate, and pointed, glabrous, horny ; volutions 

 five, the first and second ventricose. 



Helix fontinalis : testa imperforata ovato-acuminata glabra 



cornea anfractibus quinque, primo secundoque 

 ventricosis. 



Common in some of the rivulets in Devonshire. Communicated 

 by J. Laskey, Esq. 



Fig. 2, are those of the common sort ; a reversed variety of the 

 same species is distinguished by a star. 



