PEARCE : MOLLUSCA OF EAST SWITZERLAND. 2 1 5 



Mr. Roebuck and Mr. Taylor have kindly pointed 

 out the following variations : — 



H. arbustorum var. flavescens Jeff. — Maloja Pass and 

 Vicosoprano. 



H. arbustorum var. marmorata Roffioen. — Vicosoprano. 



H. arbustorum var. pallida Taylor. — At base of Septimer 

 Pass, and Vicosoprano ; above Maloja at about 8000 

 feet, and Sils Maria, 6000 feet. 



H. arbustorum var. Poiretia Moq-Tandon. — Maloja Pass, 

 a single specimen. 



Mr. Roebuck further gives me the note that one speci- 

 men from Vicosoprano agrees with the variety icteri?ia 

 Rossm. except that the markings are yellow instead of grey. 



H. zonata Studer.^Under stones in the Bergel Valley. 

 The highest altitude reached by this species coincides with 

 that of Helix poi/iatia, viz., the top of a zig-zag roadway 

 just above Vicosoprano (3,600 ft.). Dead specimens far 

 more abundant than live ones. Mr. Edgar Smith, of the 

 British Museum, kindly assisted me in identifying my 

 specimens. There are three examples of this species in 

 the national collection labelled " Europe." 



H. hispida L. — Plentiful in the Bergel Valley, from the 

 base of the Maloja Pass southw^ards as far as just above 

 Vicosoprano, below which village I did not find it. 



H. ruderata Studer. — Plentiful, though somewhat local. 

 In the Engadine it reached certainly as high as 7000 ft. on 

 the eastern side of Maloja ; also found on the Maloja Pass 

 and down the Bergel Valley, as far south as the zig-zag 

 above Vicosoprano. The clear hyaline variety frequent. 



H. rupestris Drap. — -Plentiful in the Engadine, as high as 

 7000 feet at least. Also occurred in the Bergel Valley. 

 Mr. Taylor informs me that while the Engadine forms have 

 a moderately produced spire, those from the Bergel Valley 

 belong mainly to the form that M. Bourguignat considers 

 characteristic of south of Europe. 



