MOLLUSCA OF INDIA. 121 
indicating the kale-sac, and the amatorial organ is large and termi- 
nating in a blunt rounded form. 
Odontophore. The radula (figs. 66, 6c) is about 2-75 mm. long, with 
about 82 transverse rows of teeth ; the median are all considerably 
larger than the laterals ; the centre tooth is tricuspid, as well as the 
next 8 median teeth; the next (that is the 9th and 10th) have only a 
single cusp on the outer margin, and all the succeeding laterals are 
simple, elongate, straight teeth, becoming small on the edge of the 
labial ribbon. 
ABs, Bi onBy, WEE tS sheet ya the 
55ST sp bndvpp 
The jaw (fig. 5) is straighter than in other species of this genus, 
the centre projection being on a level with the portion on either side ; 
it is longitudinally striate and about 1-2 inch in breadth. Fig. 6a 
gives a central tooth and first median on either side of a specimen 
in which the former is unsymmetrical as regards the cusps at the 
base; and this malformation continued the whole length of the ra- 
dula. Such malformation occasionally occurs in one of the set ; and 
whatever form it may assume, it necessarily is always repeated in 
each row. In this odontophore we find another departure from 
Macrochlamys, the laterals being like those of Ariophanta and Oxytes. 
—EE ann 
Shells rather large, globose or depressedly conoid ; sculpture decussate 
or papillate ; longitudinal strie, crossing fine transverse ribbing. 
MAcRocHLAMYS DALINGENSIS, n. sp. (Plate XXXV. figs. 1, 1.) 
Locality. Damsang, Daling Hill, Western Bhutan (W. Robert). 
Shell, perforations somewhat concealed, subdepressedly conoid, base 
rather flat; sculpture slender, under high power papillate (fig. 2, 
x 50), the longitudinal striation crossing coarser but fine ribbing and 
breaking it up; this is again arranged in transverse bands of growth ; 
colour dark umber-brown, with a pinkish broad margin bordering 
the peristome; spire flatly conoid, apex obtuse; suture rather shallow; 
whorls 6, rather closely wound near the apex; aperture oblique, 
ovate ; peristome somewhat thickened, milky white just within it ; 
columellar margin oblique and but slightly reflected. 
Size ; maj. diam. 24-2, min. 21-0; alt. axis 10-5, body-whorl 8:2 mm. 
¥s 0:95 ede heSD SeuBs 0-42, » 0°32 inch. 
Among Stoliczka’s drawings is one (No. 46) of a Darjiling shell 
of a dark brown colour, with a ruddy band near the peristome, the 
animal haying a very conspicuous long horn above the foot-gland 
and right and left shell-lobes, the latter well in front ; it is no 
doubt this species, although slightly smaller, and a near ally of M. 
tugurium. No. 21 of the same set of drawings represents another 
umber-coloured shell, with edge of peristome coloured, of same size 
