2 SECOND YARKAND MISSION. 



some of the specimens of Valvata still have the epidermis, and it is possible that where the 

 water of the lake is fresh, the shells may live." 



The re-appearance of two of M. Issel's new species of Limncea (originally described 

 from Persia) is important, as proving the constancy of these respective forms. The same 

 remark holds good with regard to one of my new Yunnan species. 



1. VlTRINA PELLUCID A, Miill. 



Shell perfectly undistinguishable from European specimens from Mennighlifcn and other 

 localities. Dr. Stoliczka had previously collected some twenty specimens of a similar form 

 at Lahoul. Von Martens does not record the species from Turkestan, hut describes a new 

 species as V. rugulosa, Koch, the Latin description and measurements of which seem to agree 

 fairly with the Mataian form ; unfortunately I am unable to understand the Russian descrip- 

 tion, in which he compares his new species with V. pellucida. Dr. Stoliczka describes the 

 animal of this Mataian shell as " blackish, with the tentacles very short." 



Sixteen specimens from Mataian, near Dras, Upper Indus Valley : diam. 6, alt. 3y mm.; 

 apert. diam. 3J, alt. 3J. 



2. HTALINA (CONTJLUS) FTJLVA, Drap. 



Perfectly undistinguishable, as far at least as regards the shell, from the typical European 

 form. Stoliczka had previously found the species in abundance at Spiti and Lahoul. Mr. 

 Blanford also found the species at Mazendaran in Persia. Species from Pekin are well re- 

 presented by Deshayes (Nouv. Archiv. Museum, vol. x, pi. 1). 



Three specimens from Wakhan and three from Mataian. 



3. HELIX (EnuTicicoLA) PHJEOZONA, v. Mart., Eigs. 1 3. 

 E. v. Martens, Fedsch. Moll., pi. i, fig. 8 (Kokand). 



Shell of solid texture, about the size of H. similaris, which indeed it somewhat resembles ; 

 umbilicate, conoidly globose, irregularly and roughly striate, decussated with almost microsco- 

 pical spiral lines ; straw-white, with a single, very broad brown band, just above the periphery ; 

 in a single specimen only is this band altogether absent ; spire conoidal, varying in being more 

 or less raised; whorls six, the last more or less subangulate, convex at base; aperture 

 lunately rounded, with the peristome much thickened, and the columella exceedingly 

 broadly reflected. 



Diam. 16J, alt. 12^ ; apert. diam. 9, alt. 8 mm. 



Depressed variety from Pasrobat ; diam. 16, alt. 10|. 



I ought to note that I include the margins in recording measurements of the aperture. 



Twenty specimens from Sasak Taka (6,500 ft.) and five from Pasrobat, west of Yarkand. 



