GUDK : NEW HKLICOIDS FROM THE INDIAN KEGION. 



53 



Thysanota flavida, n.sp. 



Shell narrowly umbilicate, depressed trochiform, finely plicate- 

 striate, pale yellowish-corneous; spire sub-oonvex, suture impressed, 

 apex obtuse. Whorls 6^, increasing slowly and regularlv, convex 

 above and below, carinated, the carina exserted, excei)t in the 

 protoconch, with a raised spiral thread a short distance above 

 the carina, and densely crowded with impressed spiral lines, more 

 distinct on the under than on the upper side; the carina and spiral 

 thread fringed with deciduous coarse cuticular processes, resembling 

 flattened hairs. Aperture oblique, securiform ; peristome acute, the 

 outer margin sub-convex, basal arcuate, columellar almost vertical, 

 slightly dilated. Diam. maj. 12, miii. 1 I'D mm.; alt. 7 mm. 



Hah. — India : Nilgiries (Beddome). 



Type in my collection. 



A specimen received from the late Colonel Beddome as 2\ crinigera 

 ])roved upon examination to differ from that species in being more 

 convex, and more elevated in the spire, in the whorls being more 

 convex and in the narrow umbilicus ; the keel is also more exserted, 

 while the plicate transverse striae are much less pionounced, those in 

 crinigera being almost lamellate. Mr. Ponsonby possesses two 

 immature specimens, which I refer to the new species. They were 

 likewise received from Colonel Beddome as crinigera, and, although 

 labelled only Soutli India, are probably from the same localitv. 



Plectopylis (Cuers^cia) kengtungensis, n.sp. 



Sliell sinistral, widely umbilicated, discoid, corneous. Whorls 6^, 

 narrow, increasing slowly and regularly, somewhat flattened above, 

 rounded below, the last abruptly and sliortly descending in front, and 

 slightly dilated at the mouth. Spire a little raised, suture impressed. 

 Aperture obovate, peristome slightly thickened and reflected ; upper 

 margin nearly straight, outer rounded, columellar ascending ; parietal 

 callus with a raised flexuous ridge slightly notched at the junctions 

 above and below. 



I'arietal armatuie (Fig. I) composed of a veitical plate, deflected 

 posteiiorly above, with a short oblicjuely ascending ridge below, 

 projecting on both sides; a long horizontal fold rises a short distance 

 froui the vertical plate, running parallel with the whorl and joining 

 the raised ridge at the ajjcrture ; below this occurs a second, but 

 very short fold, 2 mm. long, also rising close to the vertical plate, and 

 in a line with its lower extremity ; below the vertical plate runs 

 a third, but very thin and slight horizontal fold close to the lower 

 suture, and joining the ridge at the aperture. The palatal armature 



