collinge: non-operculate land and freshwater molluscs. 75 



narrow tube the lumen widens until about the middle of the penis, 

 then narrowing somewhat abruptly it gradually becomes less, and passing 

 through the neck as a very fine tube it expands in the first portion of 

 the head into a globular sac, which is connected on its ventral side 

 with the vas deferens (PI. iv, fig. lo). The remaining portion of the 

 head is solid. The dart-gland and the dart-sac are of about equal 

 length, and similar in shape. The external wall of the sac is marked 

 by a series of ring-like indentations. Internally theie is a small fleshy 

 dart, the surface of which is minutely studded with fleshy papillae, 

 (PI. iv, fig. ii). No trace of a muscle at the distal end of the dart- 

 gland was observed. 



The Free Mufdeti (PI. iv, fig. 12). — The buccal retractor divides 

 anteriorly into two bands which are inserted into the posterior ventral 

 portion of the buccal cavity. Both superior and inferior tentaculars 

 join to form a common tentacular retractor, and are exactly the same 

 on both sides. The columellar muscle is short and small. 



Paraparmarion, n. gen. 



Parapapmarion elongatus, n. sp. 



PL v, figs. 34-36. 



Animal dark reddish-brown, head and tentacles bluish, mantle degen- 

 erate, rising upon the shell on the right side only, as a dark brown, 

 wing-like lobe, covering the apex of the shell. Rugae scarcely visible, 

 small and flat. Peripodial groove faintly marked. Caudal mucous 

 pore very small, not extending to the foot-sole. Foot-fringe reddish- 

 brown. Foot-sole reddish-brown, divided into narrow median and 

 broad lateral planes. 



Length (in alcohol) 1 2 millim. 



Shell yellow, thin, membranaceous ; whorls 3, last whorl large 

 and globose. 



Hah. — Gunong Inas, 3,500 ft., State of Perak. 



This is one of those small, puzzling, Pannarion-like molluscs, 

 common to the Indian and Malayan faunas. I have compared this 

 interesting specimen with a large number of small Pannarion-\ikG 

 molluscs in my collection, from Java, Borneo and India, which at 

 present are unnamed, and also with immature specimens of Parniarion, 

 but can find nothing at all like it. The well-developed shell and the 

 degenerate mantle at once characterise this form, and it seems 

 desirable that it should be named, if for no other reason than that of 

 directing attention to these diminutive species. Until the internal 

 structure is made known it is difficult to say what its true position is, 

 but judging by the external features, this genus may possibly supply a 



