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.
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