MOLLUSCA OF INDIA. 129 



Subgenus Khasiella, nov. 

 (Plate C. figs. 1-5 d.) 



In my paper on the genus Euplecta (Proc. Malac. Soc. vol. ii, pt. 4, 

 April 1897) several North-east Frontier shells were included in it, 

 as originally placed by Mr. W. T. Blanford, on shell-character 

 principally, so little being known of the animal. During the past 

 year or so I have had the opportunity of dissecting a good many 

 species from Ceylon and Southern India, and among them speci- 

 mens of Euplecta in good preservation. With this knowledge, I 

 became more than ever impressed with the improbability that this 

 Ceylon genus would be found extending to the Ivhasi Hill range and 

 the hill-country to the eastward. This impression I alluded to in 

 my Presidential Address to the Malacological Society (p. 251). 



Most fortunately, when cataloguing the large number of species 

 preserved in spirit in my collection, now in the Natural History 

 Museum, I came on an unsorted bottle of shells collected by Mr. M, 

 T. Ogle on the first high ridge thrown off from the Burrail Eange, on 

 the road between Cachar and Munipur. In this I discovered four 

 specimens of Euplecta vidua, W. T. Blf. 



The anatomy, taken as a whole, is very unlike that of Euplecta, 

 and being sufiiciently distinct from other genera I am acquainted 

 with, I feel it necessary to place it in a new subgenus of the 

 Maerochlamidce, for which I propose the name Khasiella. 



The animal (Plate C. fig. 1) is dark grey about the head and neck, 

 paling towards the extremity of the foot ; the grey tint does not 

 extend to the wide pallial fringe, which is almost colourless in spirit- 

 specimens. The sole of the foot is strongly divided. The mucous 

 gland (fig. 1 a) is wide, does not extend to the sole of the foot, and 

 is overhung with a lobe. 



The right shell-lobe (fig. 1 h) is quite small, the left (fig. 1 c) is 

 long and narrow throughout. The left dorsal is in two parts, very 

 distinctly separated the one from the other. 



The generative organs (figs. 3, 3 a). Commencing at the retractor 

 muscle, this latter is peculiarly short and solid, attached to a short 

 free caecum bent downward ; at this part a long duct on one side 

 terminates at the junction of the vas deferens and a long, blunt, 

 knobbed kalk-sac ; on the other side a long, thicker duct extends to 

 the generative aperture ; an enlargement is to be noted about half- 

 way down, formed apparently by a sort of kink or fold in the duct. 

 The spermatheca is long, with a bulbous end. The amatorial 

 organ is moderately developed and of an olive-green colour. 



Odontophore (figs. 5-5 d). The centre tooth (fig. 5) has well- 

 developed cusps on each side ; the median have only one on the 

 outside, quite straight on the inner side; the 15th and IGth teeth 

 are transitional in form ; the 17th is bicuspid, the outer point much 

 below the inner one : this outer point gradually rises nearer to the 

 inner. About the 26th the laterals are long and narrow, still 

 bicuspid, and about eighteen or twenty on the margin are long and 

 aculeate. The jaw (fig. 4) has a central projection. 



In general type of anatomy this species falls into the subfamily 



