344 DR. O. F. VON MOELLKNDORFF ON [June 'L, 



convexi, striati, supremi s]nram regulariter conicam efficientes, 

 penultimus magnus, ultimus angustior, sat dis tortus, initio 

 constrictus, turn injfatultis, ad aperturam paullum ascendens, 

 basi siibcristatus. Aperfura fere vertica/is, angulato-subcir- 

 ctilaris ; peristoma subdaplex, sat expansum, incrassatum, albo- 

 labiatum, superne appressum, mnrgine basali cum columellari 

 angulum fere rectum caJcaris instar prominentem formante. 

 Lamella columellaris fere immersa, oblique intuenti conspicua, 

 spiraliter recedens^ palatalis interna, modica, crassiitscula, supra 

 columellam conspicua. 



Longit. 3, diam. max. I'ZS mm. 



Bah. ad Bukit Pondong leg. cl. R. Hungerford. 



74. Diplommatina(Sinica)diminuta, v.Molldff. (Plate XXX. 

 fig. 15.) 



T.sinistrorsa, vix.rimata, gracilis, turrlta, corneo-flavescens : spira 

 turrito-conica, apice obtusiusculo brunnescente. Anfr. 1\, per- 

 convexi, medio suhangulati, oblique costulato-striati, 2 ultitni 

 paullum distorti, ultimus penultimo angustior, initio constrictus, 

 turn inflatulus, antice ascendens. Apertura parmn obliqua, 

 angulato-subcircularis ; peristoma duplex, externum campanu- 

 latum, expansum, internum sat porrectum, expansiusculum, 

 margine columellai'i cum basali angulum subacutum formante. 

 Lamella columellaris modica, obliqua, palatalis longiuscula, 

 supra rimam tranlucens. 

 Longit. 2, diam. max. 0*9 mm. 

 Sab. ad Bukit Pondong leg. cl. R. Hungerford. 

 The four preceding species have, besides a very strongly developed 

 columellar lamella, which is produced into the interior up to the 

 constriction at the beginning of the last whorl, an inner parietal 

 and palatal plait ; the latter is shining through just above the mouth. 

 Breaking up the shell just before the constriction, we see the three 

 plaits like teeth placed in a triangle ; they serve as a kind of rails for 

 the operculum, which rests behind them on the constricted part of the 

 whorl when the animal is retired. This development of tlie closing 

 apparatus is typical for my section Sinica (Jahrb. deutsch. malak. 

 Ges. xii. 1 885, p. 369) ; as secondary character may be considered the 

 angle formed by the columella with the basal margin of the peri- 

 stome often ending in a spur-like projection. " Sinica"^ is rather a 

 misnomer, as species of this group have since been found on the 

 Philippine Islands and the Malay Peninsula; some Indian species, 

 e. g. D. gracilis, Bedd., likewise belonging to it. 



75. DiPLOMMATiNA (Sinica) stjperba, Godw.-Aust. & G. Nev. 

 Palaina superba, Godw.-Aust. & G. Nev. 1. c. p. 732, t. Ix. 



figs. 5, 5rt. 



Diplommatina superba, v. MoUdff. 1. c. p. 313. 



Bukit Pondong (Townsend, Hungerford,). 



As I have pointed out, the similarity of this pretty little shell 

 to some species of Palaina consists chiefly in the sculpture, on 



