NO. 



NEW MOLLUSKS I-ROM ASIA MOZLEY 



seven and one-half, regularly convex ; spire long and narrow, more than 

 half the length of the shell ; suture moderately deep ; aperture elongate- 

 elliptical ; outer lip gently rounded, periphery sharp and thin ; columella 

 somewhat twisted ; umbilical chink a minute elongated slit. 



Typr. — L^S.N.M. no. 469734. It comes from a small, somewhat 

 saline lake on the Steppe .Sari Dala, 15 kilometers sontliwest of Pavlo- 

 dar, northern Kazakstan. 



This species is known only from the type locality, which is about 

 400 kilometers southeast of Omsk, and 600 kilometers north of Lake 

 Balkhash. Some idea of the geographical position may be given by 

 stating that Pavlodar is situated approximately nn'dway between Delhi, 

 British India, and the .Arctic Ocean. 



Mcasurciiu-iifs oj tlic Shells 0} Lyiintaca paliistris saridalaisis, n. snhsp., from the 

 Steppe Sari Dala 15 Kilometers Sontlvwcsl of Pavlodar, Kazakstan 



LYMNAEA (GALEA) PALUSTRIS KAZAKENSIS, n. subsp. 



Plate I, fig. 7 



This resembles L. pahistris saridalensis but has eight whorls, which 

 are somewhat shouldered ; the suture is very deeply impressed, the 

 lower side of the whorls slopes into the suture in a plane not far from 

 the vertical, the superior margin of each whorl, however, while at first 

 gently curved, finally turns abruptly into the suture ; the spire is very 

 long, forming nearly three-fifths of the length of the shell as a whole, 

 and has a somewhat turreted appearance. 



Type. — U.S.N.M. no. 470457, from a small dry lake bottom near the 

 village of Novo Troetskaya, northern Kazakstan. 



