oTO LAND AND FRESHWATER 



/m \ L 1 T> rr e \ f PI. XLIII. figs. 1-1 C. 



iChara.v)kebes.Jis. Type of subgenus. { h. CXLV. figs. 5, 5 a, 5/;. 



jainiiacus, G.-A. PI. CXLIII. figs. 3, 3 a, 3 b. 



jainitiams, var. crasms. PI. CXXXVII. figs. 5, 5 a. 



kamaJciaensis, n. sp. PI. CXLI. fig. 8. 



khasiaciis, G.-A. PI. CXLIII. figs. 7, la, lb. 



{Ct/clor)jx) inangiitensis, n. sp. 



PI. CXLVI. figs. 5, 5 a. 

 PL CXLIIL figs. 11, 11a. 



nongtuvgensisi, n. sp. PL CXXXVIII. figs. 6, 5 a. 



ohsctirus, n. sp. PL CLIV. figs. 9, 9 a. 



perplextis, n. sp. PL OLV. fig. 11. 



prose.ctus, Es. PI. CXLIII. figs. 1, la, 1 h. 



pusillus, G.-A. PL CXLIII. figs. G, 6a, 6 h. 



.sirigafns, G.-A. PL CXLIV. figs. 2, 2 «, 2 b. 



sylheiicus, n. sp. PL CLIV. figs. 4, 4 a. 



ieriaevsis, n. sp. Pi. CLIV. figs. 10, 10 a. 



theobaldi, W. Elf. PL CXLV. figs. 4, 4 a, 4 b. 



theobaMi, var. solidus. PL CLV. fig. 10. 



{Diory.r) urnula, Bs., \a,Y.2nsiim. PL CLIII. figs. 8, 3 a, 7. 



Alyc-tjus birtjgosus, G.-A. No. 262S G.-A. Coll. B.M. 

 Godwin- Austen, Moll. Ind. vol. ii. 1897, p. 2, pi. Ixiii. figs. 5, 5 a. 



Locality. Khasi Hills. 



The specinien mentioned with the original description from the 

 Barak Valley is nearer to true A. Ichasiacus (Plate CXLIII. fig. 7) ; 

 it has a circular aperture. I distinguish it as A. duorugosus. 



ALTCiEtrs BIRU60STJS, G.-A., var. (Plate CLIV. figs. 7, 7 «.) 

 No. 2571 G.-A. Coll. B.M. (shell figured). 



Locality. Jawai, Jaintia Hills (9 specimens, Godivin- Austen). 



Shell depressedlj- globose, rather closely umbilicated : sculpture : 

 none on upper whorls, in fresh shells smooth and shinj^ costulation 

 for a short distance next the sutural tube ; colour very pale ochra- 

 ceous ; spire rather low, apex blunt ; suture impressed, the sutural 

 tube short ; Avhorls 3g, rounded, the last is swollen behind the 

 constriction, which is short, it is then crossed by two distinct ridges 

 which coalesce on the lower side, they fill the space up to the 

 peristome ; aperture oval, subangulate above, also below, where 

 there is a canaliculate notch ; peristome solid, double, inner 

 reflected. 



Size : maj. diam. 2'9 ; alt. axis 1"3 mm. 



This species comes near to A. A-hasiacns in several characters, 

 particularly in the short sutiiral tube. It is very much smaller, 

 much closer wound, with smaller umbilicus. It was also found in 

 the Garo Hills, No. 2755, (Plate CLV. fig. 9), hirucjosus var. minor, 

 presenting the same characters, only smaller in size, being : major 

 diam. 2'4 and alt. axis 1*1 mm. 



An allied species is A. multirvgosus of N.E. Munipur. 



