MOLLUSCA. 
9 
evenly rounded columella, which is very broadly reflected ; these characters of the columella 
appear to be its only marked difference from the European form figured by Kobelt, “Mai. Bl. ” 
1870, pi. iii, fig. 9. 
About forty specimens from Yarkand and from near Sasak Taka, on the road to Sarikol ; 
fourteen specimens from North Tangitar, of even stouter texture than the preceding ; twenty 
specimens from a marsh, 5 miles west of Panjah, in Badakshan; this is a shorter, dwarf form. 
Type of var. yarJcandensis (from near Sasak Taka) : long. 22, diam. 15|- ; apert. long. 16, 
diam. 10^ mm. 
Limnjea lagotis, var. subdisjuncta, nov. 
More than a hundred specimens from the neighbourhood of Leh ; shell smaller even than 
var. costulata, of a peculiarly dark horn colour ; whorls four to five, more convex and generally 
a little more produced, though varying in this respect, than fig. 22 B ( loc . cit.) ; aperture un- 
usually narrow, especially above ; columella sharp, scarcely reflected, almost or altogether 
detached from the body whorl, and continuous with the outer lip, in consequence of this 
peculiar character the variety is always more or less openly umbilicate. 
Typical and ordinary form of the variety : long. 11, diam. 7 ; apert. long. 1\, diam. 5 mm. 
An extremely elongate form: long. 12, diam. 6J; apert. long. 6^, diam. 4^ mm. 
A depressed form : long. 10j, diam. 7 ; apert. long. 8, diam. 5 mm. 
17. Limnaia andersoniana, Nev. 
This interesting small species, which I have described in my paper on the mollusca 
brought back by Dr. Anderson from Yunnan and Upper Burma, is probably the form mentioned 
in the systematic list of the “ Conchologia Indica ” as L. marginata, Mich., from the Shan 
Provinces ; at least Mr. Theobald gave me a single specimen from the Shan States agreeing 
exactly with typical specimens of L. andersoniana from Nantin (Yunnan). Dr. von Mar- 
tens by letter informs me that my Yarkand specimens belong to Ids “ L. pervia, which 
again is the L. davidi of Deshayes from Tibet.” I cannot, however, accept this identification 
as the original description throughout makes a great point of the open umbilicus, which 
it compares with that of L. truncatula, also stating that it is only half covered by the 
dilated columella. Out of several hundred specimens from Yarkand and Yunnan I am 
unable to discover a single specimen with what could be called an open umbilicus ; they all 
have it almost, and generally quite covered with the very broadly reflected columella. 
More than a hundred specimens, of a rather distinct variety, from North Tangitar and 
Kashgliar ; with distinctly rimate aperture and spire more produced, whorls more convex than 
in the typical Yunnan form, columella not so short or straight, and less thickened. This 
must be the form I suppose nearest L. pervia ? 
Long. lLj, diam. 7 ; apert. long. 71, diam. 5 mm. 
About a hundred specimens from Yarkand ; after a most careful examination quite undis- 
tinguishable from the Yunnan type specimens : the umbilicus is completely covered. 
3 
