3G0 LAND AND FRESHWATER 



Ahfcceus theohaldi, W. T. Blanford, var., Nevill, Hand-l. no. 4, 

 p. 290, Dafla Hills (Major H. H. Godwin-Austen). 



The specimen figured is this type-shell. Typical specimens 

 No. 2496 are in the Natural History Museum. It was thus 

 described : — 



" Is of the same form as A. theohaldi from Cherra Poonjee and 

 the Garo Hills, only that while the operculum in the latter is 

 exceedingly closely wound, quite smooth in front, and black (and I 

 have examined some dozens of shells), in the former the concentric 

 Avhorls are wider apart, have a central circular hollow space and 

 are white. The ribbing of the swollen portion in the Dafla shell is 

 exceedingly fine, and this, I note, is a common character, holding 

 good almost without exception, of all the species in the Dafla 

 Hills." 



There is also a striking difi'erence in the contraction of the whorl 

 near the umbilicus. 



It was found on the slopes of Toruputii Peak in the Dafla Hills. 



Alyc^tjs TORtrPUTTTENsis, G.-A. (Plate CXLIX. figs. 8, 3 «, 3 h ; 

 Operculum, Plate CXLV. tig. 10.) 

 Type in Indian Museum, Calcutta. 



Alycsfs (Dioetx) tjrnula, Bs., var. daflaensis. (Plate CLIII. 

 fig. 4.) 



Godwin-Austen, J. A. S. B. 1876, xlv. pt. 2, p. 178. 



Locality. Dafla Hills, Xiosi Ridge and Toruputu Peak. Prom 

 first locaUty, No. 2600, figured. 



Original desanption : — " Higher in the spire, aperture propor- 

 tionally larger ; whorls more rounded, sutural tube only one-fourth 

 the length, and the ribbing much less fine on the swell of the 

 whorl — diff"erences which by some would be considered quite 

 sufficient to warrant another name being given to this Dafla form. 

 Five specimens were found, all possessing the above character, so it 

 would appear to be quite constant." 



Altc^eus (Cycloryx) costattjs, n. sp. (Plate CLIY. figs. 2, 2 a.) 

 Type No. 2596 B.M. 



Locality . Dikrang Valley, Dafla Hills {Godwin- Austen). 



Shell narrowly perforate, elongately conical ; sculpture distant, 

 well-raised costulation, continuous up to the aperture, about 7 

 costse anterior to the short sutural tube ; colour stony- white, 

 apex yellowy pink fading to ochraceous ; spire high, sides flat, 

 apex rather ])ointed ; suture impressed ; whorls 4, well rounded ; 

 aperture circular, vertical ; peristome double, reflected. 



Bize : maj. diam. 2-75 ; alt. axis 2-0 mm. 



Quite a large number of this species was found, seventeen in all ; 

 it is a close ally oiA. {Cycloryx) paucicostatus, but is more elongate, 

 spire not so pyramidal, and it is a smaller shell. It approaches 



