AiACMirs. 257 



whitish ; spire conic, rather high ; apex blunt ; suture impressed ; 

 wliorls 4, tlie last with a sharp constriction in front of sutural 

 tube, then expaniling into a well-marked ridge inflated towards 

 aperture ; aperture circular, vertical ; ])eristome much thickened, 

 double, the outer lip with a flange whicii nearly hides the umbiUcus 

 and is sharply reflected, the inner crenulated on lower margin in 

 three notches. 



" Major diam. 3 ; alt. axis 1-75 mm." (Godwin-Austen.) 



Hah. India: Nongjiughi, Jaintia Hills, 4563 ft. (6Wifiji-^t(stoi). 



380. Alycaeus khasiacus, Godwin- Austen. 



Alyccens khasiacus, Godwiu-Aiisteu, J. A. S. B. xl, part 2, 1871, 

 p. 90, pi. 3, fio-s. 4, 4a, 4 6; Hanley &; Theobald, Couch. Ind. 

 187o, pi. 103, figs. 5, (5; Pleiffer, Mon. Pueiim. Suppl. 3, 1870. 



Moll. India, ii, 1914, pp. 376, 393, pi. 143, figs. 7, 7 a, 7 b. 

 Alycaeus {Charax) hhasiacus, Kobelt & Mollendorflj Xachr. Deuts. 



-Malak. Ges. xxx, 1898, p. 129 ; id., Cat. Pneum. 1899, p. 49. 

 Aliicueus {Dicharax) khasiacus, Kobelt, Das Tierreich, Lief. 10, 



1902, p. 372. 



Original description : — " Shell subturbinately depressed, openly 

 umbilicated, translucent, varying much in colour from horny amber 

 to pink- and dark red-browns; a shining surface, very finely 

 striated under lens, very minute ribbing on the swell of the last 

 whorl; in some specimens a faint costulation is seen. Spire 

 depressedly conoid, apex very blunt, often darker coloured than 

 rest of the shell. Suture impressed, whorls 4, well rounded, last 

 moderately swollen, sharply constricted and a^ain enlarging into 

 two vertical ridges, that nearest the mouth being the least 

 developed, and only extending across the upper portion of the 

 whorl, being cut off by the peristome. Constriction smooth, 

 sutural tube very short and thick at the base. Aperture oblique, 

 round, slightly angulate above. Peristome more or less distinctly 

 double, inner continuous, outer slightly expanded. Operculum 

 multispiral, very concave in front, convex behind, no boss. 



" Major diam. 0-15" [3*75 mm.], minor diam. 0-13" [3-25 mm.] ; 

 alt. 0-09" [2-25 mm.]; diam. of aperture 0-07" [1*75 mm.]; 

 sutural tube 0'02o" [0-65 mm.]." 



Ilab. India: Khasi and Jaintia Hills ; Cherra Poonjee, Assam 

 (Godivin-A usten). Burma : Valley of the Barak, Munipur (Godwin- 

 Austen). 



" The very short tube and very fine ribbing on the last whorl, 

 and the plain surface of the rest of the shell, combine to make 

 this a very distinct and well-marked species of the genus Alycceus. 



"This species, only smaller, in size and not with the red 

 coloration of the typical Khasi Hills form, occurred on the 

 Trigonometrical Hill Station of Angaoluo in theXorth jS'aga Hills, 

 It measures 3 nun. in major diameter as against 3'5 jnm. of the 



s 



