1862.] Contributions to Indian Malacology. 135 



Contributions to Indian Malacology* No. III. Descriptions of new 

 operculated land-shells from Pegu, AraJcan and the Khasi hills. — 

 By William T. Blastfoed, F. G. S. 



1. Alyc^us Ls"geami, n. s. 

 Testa late umbilicata, conoideo-depressa, acute sinuato-costulata, 

 albicla, interdurn rubello-albida, versus apicem ferruginea, vix trans- 

 lueens. Spira conoidea, apice obtusula, sutura parum profunda. 

 Anfr. 4 convexi, ultimus ad peripheriam sub coinpressus, ad latus 

 mediocriter tumidus, ibidem confertissime eostulatus, turn constric- 

 tus, prope aperturam non deseendens. Spatium constrictumf longi- 

 tudinis mediocris, eostulatum, medio tumidum ; tubulum suturale 

 mediocre, \ peripheric subsequans. Apertura obliqua, circularis : 

 peristoma duplex ; externo breviter inerassato-expanso ; interno ex- 

 pansiusculo, continuo. Operculum fusco-corneum, multispirum, ex- 

 terne perconcavum, nucleo centrali intus prominente papillari. 



millemetres inch 



Diam. maj. 



6 



or 0.24- 



„ min. 



5 



0.2 



Alt. 



3^ 



0.13 



Aper. diam. 



1^ 



0.07 



Habitat prope Tongoop in Arakan. 



The present belongs to the typical group of Alycceus, according to 

 Mr. Benson, and is most nearly allied to A. umbonalis, B. from 

 Pegu. It is distinguished from that species by its more raised spire, 

 smaller size, shorter sutural tube, and shallower suture, by its less 

 oblique mouth and non-descending last whorl, and by its duplex 

 slightly expanded peristome, which contrasts strongly with the 

 broadly reversed lip of A. umbonalis. That species also has the 

 upper whorls much more closely, but less sinuously costulated than 

 are those of A. Ingrami. In the subangulation of the last whorl at 

 the periphery there is some resemblance to the little Thayet Myo A. 



* My brother having left India, I have no longer the advantage of his co- 

 operation in the publication of these " contributions." In consequence of his 

 absence, I fear that I shall be unable in future to add drawings of the sheila 

 described. 



f By Spatium conslrictum or slrichira in these descriptions of Alycai, the 

 whole constricted space from the peristome to the origin of the sutural tube is 

 to be uuderstood. 



