134 HELICIDJE. 



a short obliquely descending ridge (see fig. 66 a). Below this 

 complicated plate there is a free, thin horizontal fold close to the 

 lower suture, also united to the ridge at the aperture (see also 

 fig. 66 b, which shows both armatures from the side of the 

 aperture, and fig. 66 c, which gives their posterior view). The 

 palatal armature consists of : first, a thin and long horizontal fold 

 parallel with and near the suture ; secondly, another thin but 

 shorter fold which at first proceeds horizontally, then suddenly 

 deflects posteriorly with a slight curve backwards, a small denticle 

 occurring posteriorly in a line with the main horizontal portion ; 

 thirdly, a short, somewhat stouter, crescent-shaped fold, with its 

 concave side facing the aperture and lower suture ; fourthly, a 

 strong vertical fold, with two minute denticles posteriorly near its 

 lower end ; and fifthly, a thin horizontal fold, slightly deflected in 

 the middle (see fig. 66 d, which shows the inside of the outer wall). 

 The specimen figured is in the collection of Mr. Ponsonby ; it 

 measures 13'5 milliin. in diameter. 



In looking over the specimens of Plectopylis of the McAndrew 

 collection in the University Museum of Zoology, Cambridge, I 

 found three specimens labelled Plectopylis burmani, Benson, 

 doubtless a misspelling for P. burmanica, one of Mr. Benson's 

 MS. names. On comparing them with Plectopylis Jcarenorum, I 

 found them to belong to that species. As I have reason to think 

 that P. Jcarenorum exists in some collections under the name of 

 P. burmanica, and as, moreover, this name was never, to my 

 knowledge, published by Mr. Benson, I have thought it useful to 

 mention the above fact. 



114. Plectopylis linterse, Mollendorff. 



Plectopylis linterae, Mollendorff, Nachr. Deuts. Malak. Ges. xxix, 

 1897, p. 28 ; Gude, Science Gossip, N. s. v, 1898, p. 170, fig. 88. 

 Plectopylis (s. s.) linterae, Gude, op. cit. vi, 1899, p. 148. 



Original description: "T. sinistrorsa, latissima umbilicata, 

 discoidea, solidula, subtiliter plicato-striata, lineis spiralibus tenui- 

 bus decussata, luteoflava, strigis castaneis regulariter variegata ; 

 spira vix prominula. Anfractus 6 lente accrescentes, planiusculi, 

 ultimus supra peripheriam subdistincte angulatus, turn convex- 

 iusculus, circa umbilicum subangulatus, antice breviter deflexus. 

 Apertura maxime obliqua, oblique cordif ormis ; peristoma sat 

 expansum, reflexum, valde incrassatum, albo-labiatum, marginibus 

 callo vallido elevato continuis. Lamella parietalis marginem 

 attingens, intus producta, in tertia parte anfractus lainellain 

 trans? ersam duplicatam attingens ; lamellae palatales 4, superne 2 

 spirales quarum supera longior, turn verticalis 1 longa, denique 

 iufera spiralis brevis. 



" Diam. 16-5, alt. 6*5 mm." (Mollendorff.) 



Hob. Burma : Pegu, Moulmain. 



The shell is sinistral, solid, discoid, widely umbilicated, pale 

 yellow, transversely streaked and flammulated with chestnut, 

 finely and regularly ribbed, smoother below, decussated with 



