NO. 2 NEW MOLLUSKS FROM ASIA MOZLEY 5 



LYMNAEA (GALEA) PALUSTRIS BOLOTENSIS, n. subsp. 

 Plate I, fig. 3 



Shell somewhat smaller than in all the subspecies here described 

 (length 22.7 mm) but of greater thickness; the general appearance 

 somewhat barrel-shaped in comparison with kasakensis and the others, 

 as a result of the shallowness of the suture, and the relatively large size 

 of the last three whorls; the aperture is small and roundly auriform, 

 the columella thin and only slightly twisted, and the outer lip thin, 

 sharp and without any tendency toward flaring. 



Type. — U.S.N.M. no. 469821, from flooded area between the 

 Rivers Chaganak and Chederti, Djarla-Uli drainage basin, northern 

 Kazakstan. 



Measurements of the Shells of Lymnaea palustris bolotensis, n. subsp., from 

 several localities in Kazakstan 



Greater Lesser Aperture Aperture 



Length diameter diameter length width 



mm mm mm nmi mm Locality 



Type 22.7 8.9 8.5 8.1 5.4 Flooded area between the 



Rivers Chederti and 

 Chaganak. 



21.4 9.1 8.7 9.3 6.8 Same. 



21.4 8.4 7.9 9.5 5.4 River Chaganak. 



21.3 8.9 8.1 8.7 5.7 Small lake (No. 6) near 



Novo Troetskaya. 

 21. 1 8.5 8.3 8.4 5.3 Same. 



20.8 9.0 8.1 8.7 5.9 River Chaganak. 



20.7 8.1 7.8 8.8 4.8 Lake No. 6, as above. 



20.4 8.1 7.8 7.6 5.1 Same. 



20.4 8.1 7.5 8.6 5.3 Chederti-Chaganak, as 



above. 

 20.1 8.4 y.j 8.7 5.6 River Chaganak. 



20.1 8.3 7.9 8.1 5.3 Same. 



19.5 8.0 7.4 8.2 5.3 Same. 



18.5 8.5 7.9 8.8 5.2 Same. 



17.6 7.6 7.1 8.7 4.8 Chederti-Chaganak, as 



above. 

 13.6 6.9 6.5 7.0 4.1 Same. 



The four sul>species of Lymnaea palustris here described are all 

 closely similar, but in any moderately large series it is possible to dis- 

 tinguish the different forms without difficulty. Lymnaea palustris 

 saridalensis is characterized by the tall spire, slightly convex whorls, 

 and moderately impressed suture ; kasakensis is distinguished by even 

 higher spire, slightly convex whorls turning sharply into a deep suture ; 

 dravcrti by its shorter and broader, though still acute, spire, more con- 



