348 Mr. Jeffreys on the Mollusca of the Upper Harz. 



XLIV. — On the Mollusca of the Upper Harz. 

 By J. Gwyn Jeffreys, Esq., F.R.S. 



During a visit with my family this autumn to the northern part 

 of the Harz, I assisted my son and one of his sisters in collect- 

 ing the land and freshwater Mollusca there ; and the following 

 notice of some of the less common species may be useful with 

 reference to their geographical distribution. Neither Carl 

 Pfeiffer, Rossmassler, nor (as I believe) any other conchologist 

 has indicated any localities in this part of Germany. 



Limax arborum. Occasionally in the woods about Alexisbad. 



L. Sowerbyi. Under stones at Falkenstein and other places ; not 

 common. 



Succinea Pfeifferi. With S. putris, near Alexisbad ; but less com- 

 mon than that species. 



S. oblonga. With the last ; not common. 



Vitrina diaphana. Under stones in the woods about Alexisbad ; 

 common. 



Helix fruticum, var. rufescens. On shrubs and nettles in the same 

 woods. Adult specimens are rare. 



H. incarnata. In the same woods, and at the Rosstrappe ; rather 

 common. 



H. strigella. Rubeland ; rare. A half-grown specimen contained 

 the larveeform pupa of Brilus flavescens, the female of which has 

 been named Cochleoctonus vorax, from its snail-eating habit. I found 

 a similar pupa, five years ago, in a Helix incarnata near Lausanne 

 in Switzerland, which, as in the present case, completely occupied 

 the spire of the shell after devouring its former inhabitant. 



H. lapicida, var. pallida. On rocks near Alexisbad ; rare. 



H. pygmsea. In the woods near Alexisbad ; not common. 



H. pomatia. It is remarkable that, although we diligently searched 

 for several weeks the environs of Alexisbad, not a single specimen 

 was found by us ; and the residents at that place said they had not 

 met with it. It is common in other parts of the Harz. This shows 

 how irregular and apparently capricious is the distribution of some 

 species. 



Zonites alliarius. Rosstrappe, where only one specimen occurred 

 to us. 



Z. nitens (Michaud). In woods at different places ; common. It 

 appears to have been confounded, in this country, with the Helix 

 nitidula of Draparnaud. 



Z. nitidus. In marshy places near Alexisbad and Harzgerode ; 

 common. 



Z. radiatulus, and var. pallida {Helix viridula, Menke). In the 

 woods and under stones near Alexisbad, Harzgerode, and Stolberg ; 

 common. 



Z. purus. With the last ; but rare. 



Bulimus Lackhamensis. In the woods at Alexisbad ; rare. 



Azeca tridens. With the last ; not common. 



