382 LAND AXI) JKESHWATFR 



Altc^us sYLHETiciis, n. sp. (Plate CLIV. figs. 4, 4 a.) No. 55 

 I3.M. G.-A. Coll. 



Locality. South Sylhet Hills ( Tl'\ Chennell). 



Shell globosely conoid, openly umbilicated ; sculpture : strong 

 costulation and rather distant at the base of the sutural tube, 

 becoming closer posteriorly : on the upper whorls the costulation is 

 distaut ; colour dull white, with a pink apex ; spire rather de- 

 pressedly conoid, apex blunt ; suture moderately impressed ; whorls 

 4, the last swelling next the sutural tube, Avhich is fairly elongate — 

 constriction short, tlien swelling slightly forwards ; aperture hori- 

 zontally ovate, angular at the upper inner margin, rounded below ; 

 peristome double, the outer reflected and expanded to an extreme 

 extent on the columellar side. 



Size: major diam. 2-6 ; alt. 1-7 mm. 



Only one sj)ecimen was found, but that is in excellent pre- 

 servation. 



ALTCJiTJs TEEiAENsis, u. sp. (Plate CLIY. figs. 10, 10 a.) 

 No. 2750 B.M. 



Localii)/. Teria Ghat, foot of the Khasi Hills {G ochvin-AusUn). 



Shell rather closely umbilicated, globosely pyramidal ; sculpture : 

 surface smooth on the whole, distant fine costulation on the 

 upper whorls, crossed by some 5 or 6 very distinct longitudinally 

 fine lirate lines ; strong costulation next the sutural tube ; 

 colour whitish ; spire high ; suture well impressed, sutural tube 

 moderately long ; whorls 4^, sides very rounded ; the distance 

 from aperture to sutural tube short and constricted; aperture 

 <juite circular, suboblique ; peristome double, broad and flat, and 

 ex])anded on the outer margin, very narrow on the columellar side; 

 operculum situated near the aperture, very dark brown, with a 

 central circular hollow. 



Size : major diam. '6d ; alt. axis 2-0 mm. 



The longitudinal sculpture is a very distinguishing feature of 

 this species. In form it is very similar to A. injlatus of the Naga 

 Hills. 



Alyc^us theobaldi, AV. Blf. (Plate CXLV. figs. 4, 4 a.) 



J. A. S. B. vol. xxxi. (1862) p. 142. 

 Pfr. lion. Pneum. vol. iii. p. 49. 



Original description : — " Testa aperte umhilicata, conGicleo-de- 

 2yressa, corneo-aUnda, translucens, costuUs elevatis, sinuatis, rtmotis 

 ornata, intercostulas striatula. Spira depresso-conica, apice oh- 

 tusida, sutura impressa. Anfractus 3| convexi, idtimus ad latus 

 mediocriter tumidtcs, ibidem confertissime costulatus. Spatiuni con- 

 .stricium longum, striatidum, medio tumidum. Tubidum suturale, 

 mediocre, 5 peripherioi subcequans. Apertura obUqua, expandens, 

 circidaris ; peristomci ad anfractiim j^^nidtimum breviter inter- 

 ruptum, marginibus callo junciis, duplex ; externo expansido, interuo 



