PEARCE : MOLLUSCA OF EAST SWITZERLAND, 213 



In the Bergel Valley at Casaccia and Promontogno 

 they are more frequent and of the ordinary size. 



Amalia marginata Miill. — Plentiful at Promontogno and 

 Bondo (2,600 ft.) in the Bergel Valley, but did not find it 

 higher up. 



Limax agrestis L. — Rather plentiful in the Engadine, even 

 as high as 7000 and 8000 feet. Taken frequently at these 

 altitudes on the way to the Surlej Fuorcla over against 

 Silvaplana, and by the track leading to the Longhino See, 

 west of Maloja. Specimens from these high places are 

 very diminutive. Below the Maloja Pass and throughout 

 the Bergel Valley it is very common and of the usual size. 



L. arborum Bouchard-Ch. — A single small darkish specimen 

 occurred under a stone just above Promontoguo (2,700 ft.) 

 in the Bergel Valley. 



[Limax sp. ? ]. — The mere record of a slug, a single 



specimen of which I found in a pine wood between Cas- 

 accia and Vicosoprano, but unfortunately lost before all its 

 characteristics could be noted. It was of the size of L. 

 agrestis, only more slender, of a uniform yellow colour 

 with a transparent look about it, tentacles darkish brown ; 

 quick in movement. 



Mr. Christy in his list records an unidentified Limax 

 from a pine wood near St. Moritz, 



Succinea putris L. var. parvula. — By the Silzer See near 

 Maloja and Sils in the Engadine, and at Casaccia in the 

 Bergel Valley. 



S. oblonga Drap. — Wet pasture land near Casaccia in the 

 Bergel Valley. 



Vitrina pellucida Miill— One specimen, high up above 

 Maloja, at about 7000 feet. 



V. elongata Drap. — Abundant in the Upper Engadine. It 

 reaches a higher altitude than any other species, except 

 perhaps Helix arbustoruni. Often it is associated with 

 Limax agrestis (the diminitive form), Zonites fulvus, Zua 



