94 HELICIDJE. 



Kange, Naga Hills (Godwin- Austen) ; North Cachar (H. F. 

 Blanford). 



Lt.-Col. Godwin-Austen records the fact that one of the 

 several specimens he opened, for the purpose of examining the 

 internal barriers, contained two vertical parietal lamellae, a re- 

 duplication of structure to which he thinks is clearly due the more 

 compound forms of the plicae and lamellae in the Burmese species. 

 I am inclined to think, however, that the second lamella to which 

 he refers must be the remains of an earlier set of barriers as I 

 have so frequently observed in other species, these earlier sets 

 being gradually absorbed after the completion of the later sets. 

 He states that it is essentially a forest species, found among dead 

 leaves and moss. 



The parietal armature consists of a single vertical plate, which 

 descends a little obliquely towards the aperture ; the upper ex- 

 tremity gives off on both sides a very short support, and at the 



a be 



Fig. 40. Plectopylis serica. 



lower extremity, also on both sides, a stronger support, the 

 anterior one being a little lower than the posterior one (see 

 fig. 40 a). The palatal armature consists of five more or less 

 oblique horizontal folds ; the first is longest, flexuous, and de- 

 scends a little posteriorly, the second is horizontal, and bifurcates 

 posteriorly, the upper arm straight, the lower descending obliquely ; 

 the third, shorter, at first proceeding horizontally, about the 

 middle deflecting obliquely at an angle of about 100 degrees ; the 

 fourth is a little longer, ascends a little at first and then deflects 

 posteriorly at an angle of 90 degrees ; the fifth is shortest, hori- 

 zontal, near the lower suture and parallel to it (see fig. 40 6, which 

 shows the armatures, parietal and palatal, from the posterior side, 

 and fig. 40 c, which shows the inside of the outer wall, with its 

 palatal folds; all the figures are enlarged). Lt.-Col. Godwin- 

 Austen (op. cit. p. 608) mentions six palatal folds, and his figure 

 shows a small one near the upper suture, of which, however, 

 no trace is found in the specimen now figured, which is from 

 Shiroifurar, and is in Mr. Ponsonby's collection; it measures 

 11 millimetres in diameter. 



90. Plectopylis munipurensis, Godwin- Austen. 



Helix (Plectopylis) munipurensis, Godwin-Austen, P. Z. S. 1874, 



p. 610, pi. 73, fig-. 6 (shell and armature). 

 Helix (Atopa (Plectopylis)} munipurensis, Try on, Man. Conch 



ser. 2, ill, 1887, p. 160, pi. 34, figs. 56-58. 



