PLECTOPYLIS. 



87 



shows the shell with a portion of the outer wall removed, exposing 

 the parietal and palatal armatures from the anterior side, and 

 fia:. 35 by which shows the folds from the posterior side. The 

 palatal armature consists of : first, a thin horizontal fold near the 

 suture ; secondly, a stronger horizontal fold, deflected in the 

 middle ; thirdly and fourthly, two shorter, but stronger, equal and 

 parallel folds descending obliquely ; fifthly a crescent-shaped fold 

 placed obliquely with the concave side facing the aperture (the 

 lower surfaces of these folds are seen in fig. 35 a, their upper 



bed 

 Fig. 35. Plectopylis pinacis. 



surfaces in fig. 35 6) ; sixthly, a smaller horizontal fold, which 

 becomes attenuated posteriorly (see fig. 35 d) ; two minute, 

 elongated denticles, one below the other, and placed at right 

 angles to each other, occur between the first and second folds, near 

 their posterior terminations. The specimen figured is from 

 Uarjeeling, and is in Mr. Ponsonby's collection ; it measures 15 

 millimetres in diameter. A specimen in my collection, also from 

 Darjeeling, measures 14 millimetres. Lt.-Col. Godwin-Austen's 

 figure, quoted supra, shows a short free horizontal fold above the 

 vertical parietal plate ; no trace of this fold can be seen in either 

 of the two specimens examined, neither does it occur in the 

 specimen in the Berlin Museum. 



85. Plectopylis fultoni, Godwin-Austen. 



Helix (Plectopylis) fultoni, Godwin-Austen, A. M. N. H. ser. 6, x, 



1892, p. 300. 

 Plectopylis fultoni, Pilsbry, Man. Conch, ser. 2, ix, 1894, p. 146, 



pi. 40, figs. 13-15 (shell); Gude, Science Gossip, N. s. iii, 1896, 



p. 178, tig. 23 (shell and armature). 

 Plectopylis (Endothyr a] fultoni, Gude, op. cit. vi, 1899, p. 148. 



Original description : " Shell sinistral, keeled, widely umbili- 

 cated, subglobosely discoidal ; colour pale ochraceous ; sculpture a 



