GUDE : LIST OF HELICOID LAND SHELLS. 99 



V. limitata, West. Artschaty. Section Heliomanes, Moq. 

 V. angulata, West. Artschaty; derbentina, Andrz. Taschkent ; 

 Samarkand. Saamin ; Khiva, 



semenowi, Mart. Tian-Shan ; diaphora, West. Targabak. 



Alatau. Section Theba, Risso. 

 duplocincta, Mart. Tian-Shan. seductilis, West. Kashkara, 



Sub-genus Xerocathaica, Andr. Ferghana. 



fedtschenkoi, Mart. Sarafschan. transcaspia, Boettg. 



Sub-genus Pseudiberus, Anc. Kopet Dagh. 



aspasta, West. Taschkent. Genus Hygromia, Risso. 



plectotropis, Mart. Tian-Shan. Section Fruticicoi.a, Held. 

 Sub-genus Campylocathaica, rhysota, West. Alatau. 



Andr. Genus Vallonl\, Risso. 

 rufispira, Mart. Sarafschan. ladacensis, Nev. Tian-Shan. 



retteri, Rosen. Samarkand. mionecton, Boettg. 



V. serotina, West. Samarkand; Kopet Dagh. 



Saamin. Genus Helicodonta, Fer. 

 dichrozona, Mart. Ferghana. lentina, Mart. Ferghana. 



indigena,West.Wandsch Valley. Genus Helix, L. 



Belogona Siphonadenia, Pils. Section Levantina, Kob. 

 Genus Helicella, Fer. kurdistana,Parr. Samarkand. 



B. SIBERIA. 



The vast territories comprised within the limits of Eastern and 

 Western Siberia, are comparatively poor in moUuscan life, and although 

 many large tracts of country have never been searched, it is not very 

 probable that any considerable number of new forms will come to light. 

 Among the earlier naturalists who have brought Siberian moUusca to 

 Europe must be mentioned Gebler, Ehrenberg and Middendorff; the 

 first two in 1829, the latter in 1851. Maack, during a residence of many 

 years, collected in the neighbourhood of Irkutsch, and the same 

 naturalist, in conjunction with Gerstfeldt, travelled and collected in 

 the Amur District in 1855. Other contributions were made by 

 Kindermann and Schrenck (1854- 1856), Nordenskjold and Stuxberg 

 (1875), during the Nova-zembla and Jenissei Expedition. These were 

 described by Dr. Westerlund in Kon. Svenska vet. Akad. Handl., 

 Bd. xiv, No. 12 (1877). The latter work was accompanied by a 

 plate, but unfortunately without any explanation of the figures, and as 

 no references to these were given in the text, I have thought i: useful 

 to publish here the explanation with which Dr. Westerlund has kindly 

 favoured the writer. 



