46 
CYCLOPHORUS §. 3. 
tiuscula, apice acuta; anfr. 5 convexi, ultimus fascia mediana 
alba, infra peripheriam obsoletissime angulatam fascia lata 
subtusque aliis castaneis ornatus, basi convexus, circa umbili- 
cum angustum, pervium albus; apertura parum obliqua, sub- 
circularis, iotus coerulescenti-albida ; perist. subduplex: inter- 
num continuum, igneum, expansiusculum, subadnatum, exter- 
num retlexiusculum , albidum, ad anfr. penultimum emargina- 
tum, margine columellari fere verticali, leviter arcuato, subre- 
voluto. — Operc. norm. — Diam. maj. 35, min. 28, alt. 23 
mill. Ap. intus 17 mill, longa. (Mus. Benson et Coll. Nr. 54.) 
Cyclostoma involvulus Bens, in Zool. Journ. V. p. 462. Nec Mull. 
Cyclophorus pyrotrcma Bens, in Ann. and Mag. N. H. 2d. ser. XIV. 
p. 412. 
— — H. et A. Adams Gen. rec. Moll. II. p. 280. 
Habitat ad Sikrigali et Patharghata , Bahar, et ad Rajmahal 
Bengaliae. 
0 b s. Variat magnitudine , nec non peristomate tenui , pallido. — 
Differt a C. involvulo spira elatiore , umbilico angustiore , aperturae minus 
rotundatae colore, etc. 
23. C. polynema Pfp. 
T. umbilicata , depresso-turbinata , tenuiuscula, oblique 
striatula et liris filiformibus confertissimis, subtus obsoletioribus 
cincta, superne flammis angulosis laete castaneis et albidis 
variegata; spira brevis, turbinata, apice obtusulo; anfr. 4 4 / 2 
convexiusculi, rapide accrescentes , ultimus ad suturam antice 
subplanatus, peripheria obsoletissime angulatus et fascia lata 
nigro-fusca, deorsum diluta, ornatus, circa umbilicum medio- 
crem pallidus ; apertura obliqua, subrotundata , latior quam 
alta; perist. album, continuum, breviter adnatum , margine 
dextro expansiusculo, columellari breviter revoluto. • — Operc. 
saturate castaneum. — Diam. maj. 33, min. 26, alt. 17 mill. 
Ap. intus 14 mill, alta, 15 lata. (Mus Cuming.) 
Cyclostoma polynema (Cyclophorus) Pfr. in Proc. Zool. Soc. 1854. p. 126, 
Habitat . . . ? 
24. C. Exu! Benson* 
P perforata, globoso-turbinata, tenuis, superne oblique 
striata lirisque planis inaequalibus sculpta, sub epidermide 
fulvida alba; spira turbinata, strigis fulguratis castaneis or- 
nata, apice obtusula, cornea; anfr. 5 (vix 5 l / 2 ) convexi, ulti- 
mus . rotundatus , subtus lineis elevatis minutis notatus , peri- 
pheria non fasciatus; umbilicus angustissimus , non pervius; 
apertura parum obliqua, subcircularis ; perist. tenue, vix con- 
