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Show 344 DR. O. F. VON MOELLENDORFF ON [June L, convexi, striati, supremi spiram regulariter conicam efficientes, penultimus magnus, ultimus angustior, sat distortus, initio constrictus, turn infiatulus, ad aperturam paullum ascendens, basi subcristatus. Apertura fere verticalis, angulato-subcir-cularis ; peristoma subdaplex, sat expansum, incrassatum, albo-labiatum, superne appressum, margine basali cum columellari angulum fere rectum calcaris instar prominentem formante. Lamella columellaris fere immersa, oblique intuenti conspicua, spiraliter recedens, palatalis interna, modica, crassiuscula, supra columellam conspicua. Longit. 3, diam. max. 1'75 mm. Hab. ad Bukit Pondong leg. cl. R. Hungerford. 74. DIPLOMMATINA(SINICA)DIMINUTA,v.Molldff. (PlateXXX. fig. 15.) T. sinistrorsa, vix rimata, gracilis, turrita, corneo-flavescens: turrito-conica, apice obtusiusculo brunnescente. Anfr. 7|, per-convexi, medio subangulati, oblique costulato-striati, 2 ultimi paullum distorti, ultimus penultimo angustior, initio constrictus, turn infiatulus, antice ascendens. Apertura parum obliqua, angulato-subcircularis; peristoma duplex, externum campanu-latum, expansum, internum sat porrectum, expansiusculum, margine columellari cum basali angulum subacutum formante. Lamella columellaris modica, obliqua, palatalis longiuscula, supra rimam tranlucens. Longit. 2, diam. max. 0-9 mm. Hab. 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 the closing apparatus is typical for m y section Sinica (Jahrb. deutsch. malak. Ges. xii. 1885, p. 369) ; as secondary character may be considered the angle formed by the columella with the basal margin of the peristome 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) SUPERBA, Godw.-Aust. & G. Nev. Palaina superba, Godw.-Aust. & G. Nev. 1. c. p. 732, t. Ix. figs. 5, 5rt. Diplommatina superba, v. Molldff. 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 |