MOLLUSCA OF INDIA. 33 
sculpture, 10 very fine spiral thread-like ribs far apart, with 4 close 
together at basal side of whorl near suture; colour pale ochraceous 
umber-brown ; spire conic, sides nearly flat ; suture shallow; whorls 
7, sides slightly convex ; aperture semilunate, subyertical ; peristome 
thin, oblique on columellar margin and searecly reflected. 
Size: sd diam. 3°4mm., ate axis 2°7 mm. 
O-l3inech, ..., . .0*klinch. 
This species ‘is at first sight very like S. haroldi of the Nicobars, 
but is distinguished by its more convex-sided whorls and higher 
spire, while it is not 80 flat on the base as harold?, and has a much 
larger deeper aperture. 
SITALA GROMATICA, var. (Plate X. figs. 6, 6 a.) 
Locality. Khasi Hills (G.-A.). 
Shell pyramidal, keeled, flat on base; sculpture, 12 to 14 distinct 
fine spiral ribs, crossed diagonally by irregular lines of growth, con- 
centric ribbing on basal side; colour pale horny ; spire conic, sides 
flat; suture shallow; whorls 6, slightly convex; aperture semi- 
lunar, narrow, oblique; peristome thin, perpendicular near axis, but 
becoming rapidly oblique. 
Size: major diam. 0°12 inch, alt. axis 0-09 inch. 
3°0 mm. eee lis sn cay en 
This shell only differs from the typical form in the greater number 
of the fine spiral ribs. 
Plate X. fig. 8 is a young specimen from the Jatinga valley, 
North Cachar Hills, which was the first specimen detected in my 
collection when I began sorting some of the original boxes, and it 
thus was figured before the others. 
SrTaLA HAROLDI, n. sp. (Plate X. figs. 7, 7 a.) 
Locality. Andamans (11 specimens). 
Shell pyramidal, imperforate ; sculpture, on base distant con- 
centric ribs in relief, above with 10 longitudinal or spiral white 
thread-like ribs of equal size and distance apart on each whorl 
(fig. 7 a); colour pale umber-brown; spire high, sides flat, apex 
acuminate; suture moderately impressed; whorls 7, sides flatly 
convex; aperture quadrate, slightly rounded below ; peristome thin, 
columellar thickened above, straight oblique. 
Size: major diam. 3°3 mm., alt. axis 2°7 mm. 
4 O-LDineh,p/ gy) O71 Linch, 
This pretty species, remarkable for its very pyramidal form and 
flat base, was discovered by my brother Mr. Harold Godwin-Austen. 
I at first thought it must be Heliw (Sagdinella) microtrochus of 
Morch, described in Journ. Conchyl. Oct. 1876, p. 358, until I re- 
ceived the type specimen of Sagdinella, which shows the sculpture 
to be transverse and the shell in every way different from the group 
Sitala (vide Pl. IX. figs. 1, 1 a)*. 
* This and the last described are close allies, but the form at once distinguishes 
the Andaman shell. The range of gromatica no doubt extends along the line 
of the Arakan Hills, which, there is little doubt, were once continuous with the 
Andaman Islands. 
D 
