40 LIEUT. -COL. H. H. GODWIN-AXJSTEN ON [Jan. 6, 



columellar margin perpendicular, with a spiral twist similar to what 

 is seen in Microcystina. 



Size : raaj. 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.) 



TrocJiomorpha Jcusana, Aldrich, Journ. Cincinnati Soc. N. H. xii. 

 p. 24, pi. iii. figs. 3, 3«, 3 5 (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 mm. 



" Seven specimens received. They differ in size and shape from 

 angulata, Issel ; both species, however, could just as well be placed 

 with the section Sitala of the genus Nanina" 



This shell belongs to a section of Sitala represented in India by 

 trica'inata, Nilghiri Hills, subb'dirata 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, globoselv conoid, tumid, narrowly perforate ; sculp- 

 ture 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, obhque ; 

 peristome thin, sharp ; columellar margin slightly reflected, weak. 



Size: maj. diam. 40; alt. axis 2 millim. 



Hab. 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 S. uvida from the Khasi Hills, described 

 by me (Land and Freshwater Moll, of India, p. 74). 



DuRGELLA HOSEi, u. sp. (Plate IV. figs. 5, 5 «, 5 6.) 



Shell very globosely conoid, glassy, thin ; sculpture none, a per- 

 fectly 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). 



