MOLLUSCA. 
3 
4. Helix (Fruticicola) plectotropis, v. Mart., Figs. 4—6. 
E. V. Martens, Malakozoologiche Blatter, XI, 1864, and Eedscli. Moll., pi. i, fig. 11 (Tianschang). 
Shell about the same size as the preceding; ojicnly umhiHcate, depressedly conoidal, with 
a raised keel which is distinctly visible to nearly the apex, sutures not excavated; beautifully 
and somewhat regularly sculptured, with sharp and raised oblique ribs, about half the breadth 
of their interstices, above of a light brown, with the keel and ribs of a straw colour, about 
one-fourth of the base nearest the periphery pale brown, the rest straw colour ; spire depressed, 
convex, with brown apex, whorls six, the last one sharply and prominently keeled and more 
or less convex at base, aperture diagonal (produced laterally), peristome reflected, angled 
at the periphery, the columella, as in the preceding, exceedingly broadly expanded; the aper¬ 
tures of several specimens were closed with a calcareous epiphragm. 
Hiam. 18, alt. 10; apert. diam. 11, alt. 8^ mm. 
Twenty-five specimens from Sasak Taka found living with the preceding. 
5. Helix (Frltioicola) mataiaxexsis, n. sp.. Figs. 7—9. 
Shell a little smaller than II. plectotropis, in many respects a good deal resembbng it, 
but of much thinner and more dehcate texture; openly umbilicate, depressedly conoidal, 
whorls five and a half, with excavated suture and vdthout a raised keel, in both of which 
respects it materially differs from the preceding, last whorls with a medium-sized keel, base 
convex, above sculptured irregularly, with more or less strongly developed ribs, beneath sculp¬ 
ture obsolete, almost smooth; white, irregularly mottled with pale horn colour, apex horn 
brown; aperture ovate, subangulate at periphery, almost as high as broad; peristome lightly 
reflected, columella expanded. 
Hiam. 13|, alt. 7 mm.; apert. diam. 6f, alt. 6f mm. 
Nine specimens from Mataian, in the Hras Valley, at 11,200 feet. Unfortunately most 
are quite young shells, only one or two being sufficiently full grown to show the reflected 
outer lip. Stoliczka describes the animal in his journal as “ uniform greenish dusky, no 
trace of a tail gland, the body very short, the posterior part of the foot shorter than the 
anterior.” 
6. Helix (Xerophila) stoliozkana, n. sp.. Figs. 10—12. 
Shell rather thin, about the size of R. ericetorum and closely resembling it, but more 
depressed, umbilicus slightly less open, colouration different and aperture differently shaped; 
openly umbilicate, flatly depressed; above irregularly striate, below sculpture obsolete; white; 
invariably ornamented with two striking brown bands, one of which in most, but not all the 
specimens, can be traced as far as the apex, the two bands are, of com’se, near the periphery; 
the space between them is about the width of the two bands together ; apex bright brown; 
whorls five and a half with distinct suture, not keeled, convex at base; aperture as high as 
broad, dilated above, considerably higher than the periphery in fine full-grown specimens; 
peristome slightly thickened, columella moderately reflected ; the aperture in many of the 
specimens was closed with a thin epiphragm. 
