6 
SECOND YAKXAND MISSION. 
Of the Yarkand species. Dr. Stoliczka found about fifty specimens, in all stages of growth, 
at Sasak Taka, many of them alive ; also about twenty at Pasrobat. 
12. Succinea pfeifferi, Bossm., var. 
This Yarkand variety is only distinguishable from typical European specimens by its 
smaller proportions, slightly stouter texture, and deeper amber colour. 
Long. 11, diam 6 ; apert.l ong. 7|, diam. 4 mm. 
Ten specimens from Yarkand and nine from Sasak Taka. 
Sttccinea pfeifferi, var. subintermedia, nov., Eigs. 32-33. 
Erom near Yarkand, Dr. Stoliczka also brought back about twenty specimens of a small 
form, easily distinguishable from the preceding by its less everted last whorl, thinner texture 
and lighter colour ; it is in some respects intermediate between S. putris and 8. pfeifferi, 
but its more produced spire seems to me to compel its classification with the latter ; the 
nearest European form we possess in the Museum is a Transylvanian shell sent from Germany 
as S. amphibia (putris) var. intermedia. The Museum also possesses three specimens from 
Candahar, presented by the late Captain Hutton, in no way to he distinguished from the 
Yarkand form, except in being about half as large again ; the columella is less rounded and 
decidedly more subangulate at the base, than in German and Erench specimens. I found a 
variety, however, from England agreeing in this respect with our Asiatic forms, though the 
spire is less produced in the latter ; it seems to me that the transition as regards the shell itself 
from S. putris to S. pfeifferi is almost, if not quite, imperceptible ? 
Long. 11, diam. 5f ; apert. long. 7f, diam. mm. 
13. Succinea putris, L. var. 
About forty specimens were found living on grass in a marsh near Yarkand city ; it is 
a small, thin and glassy variety, resembling in miniature a form from Wales sent me by the 
late Mr. F. Layard as S. putris, L., var. vitrea; its more swollen shape, less produced spire 
and more everted last whorl distinguish it from the form I have described above as 
S. pfeifferi, var. sub-intermedia ; its more globose shape, less produced spire, thinner and more 
■vitreous texture from my var. yarJcandensis. 
Long. 10 ; diam. 6 ; apert. long. 7, diam. 4| mm. 
14. LlMNiEA AURICUEARTA, L., Var. 
This form agrees fairly with ICobelt’s figure (Mai. Bl., 1870, pi. lii, fig. 8, L. auricu- 
lar ia, var. ventricosa ; London) ; the principal difference is the apparently constantly more 
broadly reflected columella, w r hich is also more rounded at the base ; the great tendency to 
deformity in the Sirikul specimens is very striking ; it appears to me that this form would 
he almost as well classified as an extreme variety of L. lagotis , allied to var. obliquata . 
