1»LATE clxxv. 



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

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

 ventricose, 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 commori on plants in the river Stour, 



FIG. II. 

 HELIX FONTINALIS. 



SMOOTH FRESH PT^TER SNAIL. 

 SPECIFIC CHARACTER. 



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

 five, the first and second ventricose. 



Hex^ix 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* 



