214 PEARCE : MOLLUSC A OF EAST SWITZERLAND. 



lubrica, and Helix ruderata, more especially delighting in 



damp shady places by the side of the streams which tumble 



down the mountain sides, moistening everything near with 



spray. 

 Zonites cellarius Miill. — Under stones near buildings. At 



Casaccia the specimens taken were small, but at Bondo 



and Promontogno larger than usual. 

 Z. nitidulus Drap. — A single individual (dead) found with 



Z. cellarius at Casaccia. 

 Z. petronella Charp. — Plentiful in the Engadine and Bergel 



valleys ; most frequent between 6,500 feet and 5000 feet. 



It is a beautiful little shell. 

 Z. fulvus Miill. — A plentiful Alpine species, reaching to a 



great height (8000 feet circa) and affecting damp places. 



Helix pomatia L. — In the Bergel Valley. The highest 

 point it reaches to is the base of the zig-zag roadway 

 descent just above Vicosoprano ; below that spot it is 

 plentiful among the loose stone walls. 



H. pomatia var. brunnea. — The commonest form. The 

 brown colour well diffused over the shell. 



H. pomatia var. albida. — A single specimen near Borgo- 

 nuovo. 



H. arbustorum L. — Plentiful; found at a great elevation 

 on the Engadine mountains. The variety pallida of the 

 ordinary size was brought to me having been taken at a 

 point above 8000 feet, to the east of Maloja. Individuals 

 were very numerous in the Bergel Valley. Especially 

 shall I ever remember the very great abundance of this 

 species in the alder groves beside the Maira River near to 

 Vicosoprano ; it was impossible to avoid crushing very 

 many as one walked, they were as plentiful as Helix 

 virgata is with us on the chalk downs of England. Those 

 from the Bergel Valley differ from the Engadine ones in 

 having thinner shells, but more colour. 



J.C, v., July, 1887. 



