196 MR. E. R. SYKES ON | Mar. 3, 
brunnea, stregis corners picia, fascia unica nigro-brunnea ad 
peripheriam ornata ; anfr. 44, mediocriter crescentes, convext, 
sutura bene notata separati; apertura subcircularis, peri- 
stomate mdistincte duplicato, ala parva antice angulato. 
Alt. 8; diam. max. 16 millim. 
Hab. Gunong Inas, at 5000 feet. 
I thought at first that this might be a form of P. blandi Bens., 
but 1t appears to be smaller, more elevate and not so widely 
umbilicated, and to differ in colour. In the two specimens that I 
have seen the lip is duplicated only on its outer margin, and the 
wing is small and thin. 
RHIOSTOMA JALORENSIS, sp. nov. (Plate XX. figs. 6-8.) 
Nearly related to A. houset but larger, slightly more depressed, 
and with the whorls not so tightly coiled. The tube is long and 
large, reaching the body of the shell, and is bent slightly back- 
wards at the junction. The disjoined portion of the last whorl is 
much longer than is the case in 2. housei, as will be seen from 
the figure, and is more descending. The colour resembles that 
of A. houset, and a dark band is usually present at the periphery. 
Operculum as usual. Diam. max. 29 millim. 
Hab. Limestone Hills and Caves, Biserat, Jalor. 
1 have been in some doubt as to whether this is not a local race 
of R. housei, but the differences are constant in the specimens 
examined and, I think, are of specific value. The porcellaneous 
appearance of the operculum, so often seen in this group, appears 
to be due to the wearing down of the outer layers. 
RHIOSTOMA, sp. 
Hab. Kwala Aring, Kelantan. 
A single specimen which agrees well with &. jousseawmer 
De Morgan, save that the tube is placed a little further back from 
the mouth, and is thinner and more cylindrical. It appears safer, 
however, to await further material ere describing this form. 
OPISTHOPORUS PENANGENSIS Stol. 
Opisthoporus penangensis Stoliczka, J. As. Soc. Bengal, vol. xl. 
pt. 2, p. 265, pl. x. fig. 7. 
Hab. Kwala Aring, Kelantan. 
A single specimen, which I refer to this species with some doubt. 
RHAPHAULUS ASCENDENS, sp. nov. (Plate XX. figs. 11, 12.) 
Testa pupoidea, anguste umbilicata, fusco-purpurea, dense cost- 
lato-striata, spira bene elevata, apice obtusulo; anfr. 6, plano- 
convert, penultimus .gibbosus ; apertura subcircularis, intus 
pallide fusca; peristoma pallide corneum, expansum et reflecum, 
marginibus callo junctis ; tubulus brevis, incrassatus, w sutura 
oblique ascendens. Alt. 18:5; diam. maa. 9°5 millim. 
Hab. Patalung. 
