262 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



I have recently had placed in my hands by Dr. W. T. Blanford 

 a single specimen of the mollusc which forms the subject of this note. 

 It was collected by Mr. 0. Collett, and, like all the material he has 

 sent home in formalin, is in an excellent state of preservation. The 

 exact locality given is Watawala, at 3,500 feet elevation. The shell 

 is remarkably like species of Macrochlamys, such as M. lubriea, Benson, 

 of Darjiling, and thus it has been placed by later writers in that 

 genus. 1 I should certainly have done the same, had I not examined 

 the anatomy of so many Southern Indian and Ceylon forms during the 

 last two or three years. Taking the character of the anatomy all 

 round, they are curiously unlike the Northern Indian forms, and this 

 has impressed me with the- belief that no Macrochlamys-like snail has 

 ever found its way so far south among the Ariophantinae — that their 

 paths, in fact, have been always widely separate. 



Animal. — This is slaty grey all over, darkest on the head and 

 tentacles, body elongate, extremity of foot truncate ; the pallial 

 margin at that point is broad, but there is no indication of pallial 

 grooves for some distance anteriorly, and then they are indistinct, and 

 so are the usual fringe-like markings on the margin. The sole of the 

 foot is plain and undivided. The surface is longitudinally streaked 

 and crossed by segmental V-shaped lines at intervals, very similar, in 

 fact, to that of Ratnadvipia. There are no shell-lobes. The right 

 dorsal is of moderate size ; the left is divided into a large anterior lobe 

 and a very small posterior one, with a wide interval between them. 



Generative organs (Figs. 3 and 3a). — The amatorial organ is very 

 large in comparison with the penis. This last has a well-developed, 

 thick, straight caecum (c.r.p.). There is a short kalk-sac (&.), rather 

 pointed close to where the vas-deferens enters it ; the penis sheath is 

 short, bent together, and kept in this position by a strong band of 

 muscle (r.m.). The spermatheca (sp.) is very short. There is a very 

 distinct, smooth, ovoid swelling, of a pale-yellow tint, just above the 

 spermatheca, which I have suggested may be an ovitheca (o.t.). It is 

 present in several species of the Ariophantinae, 2 and has been figured 

 and described by me in "Land and Fresh- water Mollusca of India," 

 p. 128, pi. xcviii, figs. 2, 2a. 



Alimentary system. — The salivary glands are in two separate lobes. 

 The retractor muscles, given off from either side of the posterior end 

 of the buccal mass, join at a short distance and form a single strong 

 muscle. The jaw is arched, and has a central projection. The radula 

 is wide. The rhachidian tooth is broad, with large cusps on either 

 side ; the admedian teeth have one cusp on the outer side ; the laterals 

 which follow are narrow, long, aculeate in form, with a very indistinct 

 indication of a notch near the apex ; the outermost are very short and 

 bluntly pointed. The formula is 56 : 2 : 18 : 1 : 18 : 2 : 56. 



1 Mr. Blanford, writing on 14th April with this species before him, says: — "I shall 



be curious to know the results of your dissection. If the shape of the animal 

 means anything, H. politissima should be an ally of the Macrochlamys group, 

 not of Ariophanta. It may be quite peculiar." 



2 Ariophanta hevlpcs, Nilgiria ligulata, and N. Tranqutbarica. 



