2l6 PEARCE : MOLLUSCA OF EAST SWITZERLAND. 



H. pygmasa Drap. — Among moss and damp stones with Ver- 

 tigo pygjncea, near Maloja (6000 feet), also at Casaccia in 

 the Bergel Valley. This species is commoner than is 

 generally supposed. 



H. pulchella var. costata Miiller. — In the Bergel Valley from 

 Casaccia southward. 



H. obvoluta Miiller. — Not uncommon. Occurred on the 

 Maloja Pass, and at different points throughout the Bergel 

 Valley. 



H. holoserica Studer. — -Under large stones within the ruined 

 walls of the very interesting old Gothic church above 

 Casaccia. Only a few specimens taken. 



Pupa marginata Drap. — On rocks at Sils Maria in the 

 Engadine (6,100 ft), associated with H. 7-upestris. In the 

 Bergel Valley plentiful, especially about Casaccia and along 

 roadside to Vicosoprano. 



P. marginata van albina Menke. — On ruined wall of old 

 Gothic church, Casaccia. 



Vertigo pygmaea Drap. var. athesina. — Several in damp 

 moss by stream on east side of the Maloja lake (6000 ft.). 



V. edentula Drap. — Plentiful in the Engadine at the roots of 

 grass, and especially Saxifraga aizoides by the side of 

 mountain streams. It extended above 7000 feet. 



V. edentula var. columella Von Martens. — A few specimens 

 after a diligent search among the loose stones and rubble 

 in the nave and chancel of the ruined church near Casaccia. 

 The typical form not taken with the variety. 



Balea sp. ? — A soHtary fragment of a Balea (probably 



perversa) found under a large stone in the Fedoz Valley, 

 in the Upper Engadine, at a spot about 7000 ft., and not 

 very far from the glacier of that name. 



Clausilia plicatula Drap. — Has a somewhat limited range in 

 the Bergel Valley. Abundant near Casaccia, especially so 

 about the ruins of the old Gothic church, and extending 

 thence as far as the zig-zag in the road above Vicosoprano. 



J.C, v., July, 1S87. 



