a ay 
1923.] Zoological Results of Expedition to Yunnan. 417 
Limnaea yunnanensis Nevill. 
1877. Limnaea yunnanensis, Nevill, Journ. Asiat. Soc. Bengal, XLVI (2), 
Ds 27. 
1881, cco? yunnanensis, id. ibid., L. (2), p. 142, Plate V, Fig. 8. 
The species is closely related to the Indian L. acuminata, 
some of the smaller forms of which resemble it very closely. 
A constant difference is to be found in the outline of the lip of 


Fig. l. Limnaea Sacre Nevill. 
(a) Type specimen of the speci 
(b) Type-specimen of the form per from Erh-hai. 
the shell, which in L. acuminata is never strongly arched in its 
upper half as it is in L. yunnanensis. My L, shanensis is also 
— related, but its eaten callus is much better devel- 
type-specimen of L. yunnanensis is 17°5 mm. high 
and Nevil eewinansty made some mistake in his description on 
1S pon 
