176 LAJilD AND FRESHWATER 



the ludiaa Museum, Calcutta, appears to be fairly numerous in the 

 deep hot valleys of Sikkim. 



Xaliella shillongensis, n. sp. (Plate CIII. fig. 5.) 



Locality. Shillong, Khasi Hills {H. H. O.-A.). Two specimens 

 were found. 



Shell globosely conoid, very narrowly umbilicated, rounded 

 below ; sculpture very fine, regular transverse ribbing ; colour 

 umber-brown ; spire less than breadth, apex blunt ; suture well 

 impressed ; whorls 5|, rather closely wound, sides convex ; aperture 

 lunate, suboblique ; peristome thin, scarcely reflected ; columellar 

 margin suboblique. 



Size : maj. diam. 2-1, alt. axis 1'4 mm. 



Compared with K. Ihotaensis (Plate V. fig. 2, Yol. I.), this shell is 

 smaller and the whorls much more convex ; with ty\)icaljlutura, it is 

 larger, but the whorls do not increase in the same way and in the 

 same proportion ; and the same may be said of the very similar 

 shell from the Sikkim frontier, which differs in having a larger 

 body-whorl and larger aperture ; they all, ia fact, merge into one 

 another. 



Kaliella flatura, var. (Plate CIII. fig. 3.) 



(Vide Vol. I. Plate V. fig. 10, K. flatura, G.-A., Munipur.) 



Locality. Richila Peak, 10,370 feet, on Darjiling-Bhutan frontier 

 {W. Robert')., also Risett chu Valley and Damsang. 



Shell globosely conoid, umbilicated ; sculpture very minute, 

 transverse ribbing, only visible under high power, smooth to eye 

 and not so regular on the last whorl as it is on the rest of the 

 whorls ; colour pale ochre ; spire, sides slightly convex ; apex 

 rounded ; suture well impressed ; whorls 5, very convex ; aperture 

 semilunate ; peristome thin ; columellar margin suboblique and 

 slightly reflected. 



Size : maj. diam. 2-25, alt. axis 1'36 mm. 



It is interesting to find this minute shell in the Eastern Himalaya, 

 80 extremely close iu form to that I found in Munipur, the sculpture 

 on the last whorl not being so regular as in the type ; it is similar 

 above. 



Kaliella bhdtanensis, n. sp. (Plate CIII. figs. 7, 7 a.) 

 Locality. Damsang, Baling District, Western Bhutan Hills. 

 Shell conical, perforate, flatly rounded on base, keeled ; sculpture 

 microscopic, transverse, irregular lines of growth, these are well 

 shown on the basal side ; colour pale dull ochreous ; spire high, with 

 convex sides, apex blunt ; suture very shallow ; whorls 8, closely 

 wound, flat-sided ; aperture narrowly quadrate ; peristome thin 

 columellar margin short, nearly vertical. 



