426 
1852 en getiteld „Notes on the genus Cyclostoma; and charac- 
ters of some new species from India, Borneo and Natal” ko- 
men volgende beschrijvingen voor van nieuwe soorten van Pi- 
nang en Borneo. 
Cyclostoma malayanum Bens. Testa depresso-turbinata, lae- 
vigata, spiraliter exilissime obsolete striata, supra castanea, 
albido undulatim strigata, interdum plurifasciata, subtus albida, 
castaneo anguste fasciata, infra periphaeriam fascia latiuscula 
saturata, albido sparse articulata, ornata; spira exsertiuscula, 
apice acutiuscula; anfractibus quinque subconvexis, ultimo ro- 
tundato, subtus convexo; apertura vix obligua, magna, cir- 
culari, albida; peristomate duplicato, leviter adnato, externo 
plane expanso, superne arcuato, labio angusto; umbilico me- 
dioeri, pervio, subperspectivo. Diam. major 43, minor 32, 
axis 29 mill. Hab. In montibus vallibusque Ínsularum Penang 
et Lancavi, nee non in Peninsula Malayana. Teste Dr. T. 
CANTOR. 
This shell, collected by Dr. Carrom, is one of the group which contains 
C. Pearsoni, Siamense, Tuba, &c. The peculiarly flattened double pe- 
ristome will at once serve to distinguish it from any of the allied species. 
The colouringgalso is of a particularly sober character. 
Cyclostoma anostoma Bens. Testa perforata, turrita, tenui, 
exiliter striata, pallide castanea, apice acutiuscula albida; an- 
fractibus septem convexis, ultimo antice breviter adscendente, 
basi rotundato; apertura ampla, vix obliqua, leviter sursum 
spectante, subeireulari, fauce castanea, margine rufo; peristo- 
mate duplicato, tenui, interno continuo, subito expansa, ex- 
terno plane dilatato, praecipue ad partem columellarem, vix 
reflexiusculo. Axis 23, diam. anfr. penult. 10, diam. apert. 
wf 8 
extern. 9, alt. apert. 74 mill. Hab. in Insula Borneo. 
In form much resembling C. alfum of the Philippines, but shorter and 
more rapidly tapering from the base to the summit, differing also in te— 
nuity, in the pale apex, the absence of a funiculate keel at the base, the 
more convex whorls, and the more coarsely striate ultimate volution. The 
penultimate whorl is not Lroader than the last, as it is in C. altum; at 
the same place where the channel occurs on the inner lip in that shell 
there appears a very slight indentation. The summit and succeeding whorl 
are white, as in C. Guildingianum Pfeiffer. Two slightly impressed lines 
traverse the last wborl spirally in the only specimen received through Dr. 
Bacon. They appear to be accidental, and have therefore been omitted in 
the specific description. 
Cyclostoma quadrifilosum Bens. Testa umbilicata, globoso-tur- 
binata, sub epidermide hispida, et crebro oblique lamellata, 
nitida, spiraliter Á-lirata, interstitiis striis minutissimis spirali- 
bus, alias obliguas decussantibus, munitis, castanea, superne 
