1871.] Godwin- Austen — Descriptions of Alycceinco. 89 



Habitat. The Diyung valley, north of Asalu, in N. Cachar Dis- 

 trict. 



This shell is at first sight, very like A. hebes, Bs., but can easily 

 be distinguished by its much narrower umbilicus, its more polished 

 surface and less expanded mouth. 



A small variety of this shell was obtained and deserves special 

 notice. The striation is wanting throughout, and the costulation on 

 the swollen portion of the last whorl is somewhat shorter ; in these 

 characters it approaches very near to A. nitidics, W. Blanford, 

 from Arakan, but the recurved rib is in this last species much less 

 developed. 



Alycseus pusillus, n. sp. PI. Ill, fig. 3. 



Shell depressly turbinate, moderately umbilicated, thin, trans- 

 lucent, vitreous, pale horny, smooth, rarely shewing any signs of 

 costulation, the sculpture when present is very fine and distant ; 

 closely and regularly ribbed on the expansion of the last whorl, 

 also within the umbilicus. Spire depressly conoid, apex blunt, 

 suture moderately impressed, whorls 3 J, the last scarcely swollen. 

 Constriction very slight, smooth, sutural tube very short and thick ; 

 aperture oblique, round, peristome double, inner continuous, both 

 lips expanded. Operculum thin, horny, transparent, multispiral, 

 slightly concave and without central boss at back. 



Major diam. 0'09".— Minor diam. 0-075".— Alt. 0*055".— Diam. 

 of aperture, 0-035".— Sutural tube, 0-012". 



Habitat. This shell was first found by me near Jawai, it is an 

 abundant form in some localities, especially on the banks of the 

 Kopili river on the road from Jawai to Asalu, via Sufai. 



The species is very similar to A. humilis described by Mr. "W. T. 

 Blanford, from Akouktoung, Burma, but this last is a larger, thicker 

 shell, and the outer lip is reflected near the umbilicus which is not so 

 open, as in the new shell above described. On a comparison of the 

 Alyccei in Mr. W. T. Blanford' s collection and those obtained by 

 me, A. humilis also turned up ; I had previously noted the shell 

 as differing from B. '. pusillus. 



A. humilis is common at Nongtung in the Jaintia hills ; it has 

 also been found in the W. Khasi Hills, and as far east as the Jhiri 



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