260 VALLONIA. 



V. MINONECTON Boettger. PI. 43, figs. 67, 68, 69. 



Smaller [than tenuilabris], more depressed, almost regularly, very 

 finely rib-striate ; whorls only 3, the last, as also the superior margin 

 of the peristome somewhat angular above; size 2i-2:H mill. 

 (Boettger.*) 



(Transcaucasia, on the summit of the Agh-dagh in the Kspet-dagh 

 at 9-10,000' 



Hel. adela West. vai. mionecton BOETTGER, Zool. Jahrb. IV, 

 1889, t. 27, fig. 11. 



Westerlund (Fauna, I Suppl., p. 120) refers this form to V. tenui- 

 labris, as a variety. Boettger evidently later regards it as a distinct 

 species. 



Var. SHAMHALENSIS Rosen. 



Differs from the type by the shell being polished, not rib-striate. 

 (Rosen, Nachr.-Bl. D. Mai. Ges., 1892, p. 123.) 4 



Shamhala, Prov. Chorassan, Persia. 



I have seen no specimens. 



V. LADACENSIS Nevill. PI. 56, figs. 19, 20, 21. 



Shell depressed, broadly and perspectively umbilicated so that all 

 the whorls are visible from below ; densely costulate, the riblets some- 

 times almost obsolete; thin, gray-white; spire little projecting; 

 whorls 3, slightly convex, the last rounded, distinctly descending in 

 front. Aperture very oblique, transversely piriform, the peristome 

 expanded, rather thin, margins approximating, the upper moder- 

 ately, lower more arcuate. 



Alt. 1, greater diam. 3?, lesser 2* mill.; aperture diam. li 

 oblique alt. 1 mill. (Martens.) 



Central Asia, near Iskardo in Thibet ; northern foot of the Tian- 

 shan Mts.; Mataian and Leh, Ladalc region. 



Helix ( F.) ladacensis NEV., Scient. Res. of the second Yarkand 

 Miss., Moll., p. 4. MTS., Centralasiat. Moll. 1882, p. 3, t. 3, f. 3. 

 WESTERLUND, Fauna I, p. 15. 



I have not seen this form. 

 V. ASIATICA Nevill. Unfigured. 



This is probably the variety recorded by von Martens from 

 Turkestan, measuring 3 mill, in diam., 1 J in height ; it differs from 

 the typical European form by its larger size and slightly stronger 

 subangulation at base, near the umbilicus. More than a hundred 



