OCR Text |
Show 40 LIEUT -COL. H. H. GODWIN-AUSTEN ON [Jail. 6, columellar margin perpendicular, with a spiral twist similar to what is seen in Microcystina. Size : maj. diam. 3*0 ; alt. axis 2*2 millim. Hab. Borneo, cave-earth. The peculiar character of this shell is the form of the columella, which is thickened and has a sharply sinuate outline. In other respects it is like S. gromatica of the Khasi Hills and Munipur, and S. haroldi of the Andaman Islands. SITALA KUSANA. (Plate IV. fig. 8.) Trochomorpha kusana, Aldrich, Journ. Cincinnati Soc. N . H. xii. p. 24, pi. iii. figs. 3, 3 a, 3 b (1889). Mr. Aldrich has kindly sent me two examples of this shell and some others described by him. I append his original description, as it may not be available to some conchologists :- " Shell minutely perforate, thin, subtrochiform, light horn-colour, translucid, with about three transverse raised striae parallel to the suture ; whorls six, strongly rounded, the body-whorl non-descending; spire obtuse ; base rounded ; aperture flattened, ovate, the transverse diameter the largest, peristome acute; columella reflexed at base and partially covering the umbilicus. Diam. 3 mm.; alt. 2 m m. " Seven specimens received. They differ in size and shape from angulata, Issel; both species, however, could just as well be plaeed with the section Sitala of the genus Nanina." This shell belongs to a section of Sitala represented in India by trica'inata, Nilghiri Hills, subbilirata of Little Brother Andaman Island, and carinifera of Penang. One example in Dr. Hungerford's collection (Sir H. Low). SITALA (?) ORCHIS, n. sp. (Plate V. fig. 3.) Shell dextral, globosely conoid, tumid, narrowly perforate; sculpture transverse, fine equidistant costulation on the whorls, beneath with concentric rather coarse lineation; colour sepia-brown ; spire pyramidal, sides slightly convex ; apex blunt, rounded ; suture well impressed ; whorls very convex ; aperture semi-lunate, oblique ; peristome thin, sharp ; columellar margin slightly reflected, weak. Size : maj. diam. 4 0 ; alt. axis 2 0 millim. Hub. Borneo. This shell was sent from Labuan, where it had been introduced on Orchids collected by Mr. Hose on the mountains. It is very similar in form to S. recondita and 5. uvida from the Khasi Hills, described by me (Land and Freshwater Moll, of India, p. 74). DURGELLA HOSEI, n. sp. (Plate IV. figs. 5, 5 a, 5 b.) Shell very globosely conoid, glassy, thin ; sculpture none, a perfectly polished surface ; colour very pale horny; spire low ; apex rounded ; suture adpressed ; whorls 4, rapidly increasing, sides much rounded, aperture lunate ; peristome slightly reflected on the vertical columellar margin. Hab. Busan Hills (Mr. Hose). |