164 LAND AND FRESHWATER 



suboblique, ovoid ; peristome nearly circular on the periphery ; 

 columellar margin straip;ht, perpendicular, weak. 



Size: maj. diam. 10-0, min. 8-2; alt. axis 4*0 mm. 



This shell was also found at Jawai, in the Jaintia Hiils. I have 

 named it after Sir Joseph Hooker, who describes so well in his 

 'Himalayan Journals' the deep valley under Cherra Poonjee. 



Macrochlamys zemoensis, n. sp. (Plate CX. figs. 1-1 /t.) 



Locality. Zemo Samdong, Sikkim, valley of the Laehen, about 

 12,000 feet. In the pine-forests. 



Shell (figs. 1, Iff) globoseiy conoid, glassy, fragile, narrowly 

 umbilicated ; sculpture quite smooth ; whorls transversely crossed 

 by wavy furrows of growth, here and there traces of longitudinal 

 strife under high power; colour ochraceous with an olive tint, some 

 more sienna-brown than others ; spire rather depressed, apex 

 rounded ; suture moderatelj' impressed. Whorls 5, regularly in- 

 creasing ; aperture broadly lunate ; peristome very thin ; columellar 

 margin weak, scarcely reflected. 



Size: maj, diam. 10"0, rain. 9'0 ; alt. axis 4*5 mm. 



Animal (figs. 1 h-d) with a dark-coloured broad margin to the 

 foot, pale on the keel of same, the pallial fringe broad ; the lobe 

 over the mucous gland long and pointed ; sole of foot well divided. 

 The right shell-lobe (fig. 1 c) is large, rather broad at base. There 

 is a small narrow left shell-lobe and the left dorsal lobe is in two 

 separate parts. The visceral sac (fig. 1 h) is sparsely spotted near 

 the suture, with a black band bordering the mantle-zone, and a 

 long black band runs parallel to the renal organ. The salivary 

 glands (fig. 1 e) are in one compact mass. 



Genitalia (fig. 1/). The penis-muscle is attached to a coiled free 

 caecum, as I have noticed in M. richilaensis ; there is a short flagellum 

 where the vas deferens joins. The amatorial organ is moderately 

 long and straight. 



The jaw (fig. If/) has a central projection. 



The radula formula is 



35 . 1 . 9 . 1 . 9 . 1 . 35 to 40 

 45 . 1 . 45 



The centre tooth is tricuspid ; the admedian teeth have a very small 

 inner cusp high up on inside and a larger one lower down on the 

 outside : the marginal teeth are bicuspid, the outer cusp below the 

 main one (fig. 1 h). 



Maceochlamts kakaensis, n. sp. (Plate CX. figs. 2-2 b.) 



Locality. Richila Peak, Bhutan frontier. 



Shell (fig. 2) subdepressedly globose, very narrowly perforate ; 

 sculpture well marked, fine, regular, longitudinal striation, showing 

 even on the lower side ; it is a far stronger striation than is seen in 

 M. sathilaensis ; colour pale ashy brown ; spire flatly conoid ; suture 



