MOLLUSCA. 
9 
©vGnly roimd-cd. coIuhigIIsj} wliicli is VGry "brocid-ly rcflGctGd. i tliGSG cli&rtictGrs of tliG coIuiugIIcI 
appGar to bo its only markod difforoncG fromthoEuropoan formfigniodby Kobolt, “Mai. BL,” 
1870, pL iii, fig. 9. 
About forty spocimons from Yarkand and from noar Sasak Taka, on tho road to Sarikol; 
fonrtoGn spocimons from North Tangitar, of GVGn stontor tGxtnro than tho procoding; twGnty 
spocimons from a marsh, 5 milGS WGst of Banjah, in Badakshan j this is a shortor, dwarf form. 
Typo of var. yafkandensis (from near Sasak Taka) : long. 22, diam. 16^; aport. long. 16, 
diam, 10|^ mm. 
Limn.®a lagotis, var. subdisjuncta, nov. 
MorG than a hundrGd spGcimGns from tho noighbonrhood of LgIi ; sIigII smallor Gvon than 
var. costulata, of a poculiarly dark horn colour; whorls four to fivG, moro convGX and gcnorally 
a littlG moro producod, though varying in this rospoct, than fig. 22 B {loo. cit.) ; apGrtnro un¬ 
usually narrow, Gspocially abovG; columGlla sharp, scarcoly rofloctod, almost or altogothor 
dotachod from tliG body whorl, and continuous with the outer lip, in consequence of this 
peculiar character the variety is always more or less openly umbiheate. 
Typical and ordinary form of the variety: long. 11, diam. 7; apert. long. 7^, diam. 6 mm. 
An extremely elongate form: long. 12, diam. 6^; apert. long. 6^, diam. 41 mm. 
A depressed form: long. 10^, diam. 7; apert. long. 8, diam. 5 mm. 
17. Limn^a andeesoniaxa, Nev. 
This interesting small species, which I have described in my paper on the mollusca 
brought back by Er. 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 smgle 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 his “ 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 
Kashghar; 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. perma ? 
Long. 11^, diam. 7 ; apert. long. 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. 
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