20 G. '^GYill— List of the MoUusca of [No. 1, 



from the former, the very open umbilicus &c., from the latter. A single 

 specimen was found at Ava, agreeing exactly with typical specimens from 

 the Arakan Hills. 



Helix (Plectoteopis) catostoma, Blf. 



Selix (TrachiaJ catostoma, Blf,, P. Z. S. 1869, p. 447 (Ponsee). 

 jBT. catostoma, Blf., Con. Indica, pi. 6Q, figs, 2, 3. 



The specimen figured in the Con. Indica is not taken from a typical 

 Yunnan specimen, but probably from one from Assam. The type in the 

 Indian Museum, found at Ponsee on the First Expedition, is the only adult 

 specimen as yet found in Yunnan ; though, indeed, nine or ten immature 

 specimens were also found, in none of which, however, are the characters 

 of the lij) developed. H. catostoma was found by Major Godwin- Austen and 

 Mr. Robert tolerably abundantly in the Naga Hills, and it is j)robably one of 

 these specimens that is figured as above in the Con, Indica ; they only differ 

 from the type form by the less depressed spire and slightly less open umbi- 

 licus ; the characters of the aperture are the same, the dentiform process on 

 the basal margin being equally developed and characteristic in both. 



Helix (Plectoteopis) huttotti, Pfr., var. savadiensis nov. 

 Helix Suttoni, Pfr., Symb. II. (Landour, &c.) 



The shell represented in the Con. Indica, pi. 15, fig. 8, is not, I think, 

 a typical specimen from the North- West Himalayas, but rather a specimen 

 from DarjiHng ; the former is a smaller, more rounded, and less solid shell, 

 scarcely keeled at the periphery, with a higher spire and less produced aper- 

 ture. A form found by Dr. Anderson abundantly at Ponsee and Ava is 

 nearer the Darjiling form ; the spire is slightly higher, with the apex more 

 central. Seven specimens of a distinct and remarkable variety were also 

 found at Sawady ; at fii'st sight these present a curious resemblance to S. 

 arahanensis, and with that species are probably the connecting link between 

 H. tapebm and H. liuttoni, though unmistakably only a variety of the 

 latter ; var. savadiensis differs by its more raised spire, stouter texture and 

 less open umbilicus. H. winteriana, v. d. Busch. (Java) seoms to be a var. 

 of H. liuttoni, differing by its more open umbilicus. 



Specimen from Darjiling, axis 5|-, diam. Vl\ mil. 



Var. savadiensis, from Sawady, axis 7, diam. Vl\ mil. 



Helix (Plectoteopis) Phateei, Theob. 

 Helix Thayrei, Theob., J. A. S. B., 1859 (Ava) ; Con. Indica, pi. 1, fig. 15. 



This is the largest species of the group, and is well figured in the Con. 

 Indica ; it appears to be rare, as three specimens from Ava are all there are 

 in the Museum. It is next alUed to typical K. tapeina, the umbilicus be- 

 ing exactly similar ; the periphery, however, is merely angulate, not keeled j 



