CYCLOPHORUS. 
Prate VII. 
Species 26. (Fig. a, 6, Mus. Cuming.) 
CyctorpHorus Boucarpi. Cyel. testd subampliter per- 
spective umbilicatd, depresso-orbiculari, albidd, epider- 
mide fulvad saturatius fasciaté induta, versus apicem 
roseo-tincta, anfractibus undique densé rugoso-malleatis, 
subangustis, declivi-rotundatis ; apertura circulari, 
parviusculd, labro simplici. 
Bovcarp’s CycLopHorus. Shell rather largely perspec- 
tively umbilicated, depressly orbicular, whitish, co- 
vered with a fulvous darker-banded epidermis, tinged 
with rose towards the apex, whorls densely ru- 
gosely malleated throughout, rather narrow, slopingly 
rounded ; aperture circular, rather small, lip simple. 
Sat, Pfeiffer, Pro. Zool. Soc. 1856, p. 323. pl. 35. f. 25. 
Hab. Cordova, Vera Cruz, Mexico; Sallé. 
The colouring of this species resides in the epidermis. 
The surface is closely roughly indented throughout. 
Species 27. (Fig. a, 4, c, d, Mus. Cuming.) 
CycLopHorvs Cuminetr. Cycl. testdé amplissime perspec- 
tive umbilicatd, subdiscoided, albd, epidermide supra 
peripheriam laté nigricante-fusco fasciaté indutd, 
versus apicem rosed, anfractibus angustis, rotundatis, 
jucta suturas depressis, undique densé spiraliter sul- 
catis; apertura oblique circulari, labro simplici, haud 
continuo. 
Cumine’s CycLopnorus. Shell very largely perspectively 
umbilicated, slightly discoid, white, covered with an 
epidermis, which forms a broad blackish-brown band 
above the periphery, rose towards the apex, whorls 
narrow, rounded, a little depressed next the sutures, 
closelyspirally grooved throughout; aperture obliquely 
circular, lip simple, not continuous. 
Cyclostoma Cumingii, Sowerby, Pro. Zool. Soc. 1832, p. 32. 
Cyclostoma striatum, Lea. 
Cyclophorus Cumingii, Pfeiffer. 
Hab. Island of Tumaco, West Columbia; Cuming. 
In this Central American type also, the colouring of the 
broad dark band resides only in the epidermis, the shell 
being pure white, tinged towards the apex with rose. In 
the specimen, Fig. 27 c, d, the band has nearly disappeared 
with the peeling off of the deciduous epidermis. 
Species 28. (Fig. a, 4, Mus. Cuming.) 
CycLopHorus purus. Cycl. testd latissimée perspective 
July, 
umbilicatd, depressd, albd, anfractibus angustis, rotun- 
datis, undique dense acute spiraliter liratis ; apertura 
obliqud, labro simplici, haud continuo. 
Tur pure CycLopnorus. Shell very broadly perspec- 
tively umbilicated, depressed, white, whorls narrow, 
rounded, densely spirally sharply ridged throughout ; 
aperture oblique, lip simple, not continuous. 
Cyclostoma purum, Forbes, Pro. Zool. Soc. 1850, p. 56. 
pl. 9. f. 9. 
Cyclophorus purus, Pfeiffer. 
Hab. Central America; Kellett and Wood. 
This shell belongs to the same natural type as the pre- 
ceding species, and may eventually prove to be a variety 
of it. It only differs from C. Cumingii in beg more 
depressly convoluted, and in the spiral ridges being more 
prominently developed. Like that species, the shell is 
more white, with a very faint tinge of rose towards the 
apex, and it may very probably have a coloured deciduous 
epidermis. There is little doubt of its being a uative of 
the same habitat, as it was collected by Captain Kellett 
and Lieutenant Wood during the surveying expedition of 
the ‘ Herald’ and ‘ Pandora’ on the coast of Ecuador. 
Species 29. (Fig. a, 6, Mus. Cuming.) 
CYCLOPHORUS SEMISULCATUS. 
cavato-umbilicatd, soliduld, depressd, alba, superné 
fusco lentiginosd, ad peripheriam fascia nigricante- 
fused lineari cingulatd, deinde pallide fasciatd, anfrac- 
tibus angustis, rotundatis, spiraliter liratis, juxta 
Cycl. testd ampliter ex- 
suturas concavo-planatis ; apertura circulari, labro 
incrassato, continuo, haud reflexo. 
THE HALF-GRoovED CycLtopHorvs. Shell largely ex- 
cavately umbilicated, rather solid, depressed, white, 
freckled at the upper part with brown, encircled with 
a linear blackish-brown band at the periphery, then 
faintly banded, whorls narrow, rounded, spirally 
ridged, concavely flattened next the suture ; aperture 
circular, lip thickened, continuous, not reflected. 
Cyclostoma semisulcata, Sowerby, Pro. Zool. Soc. 1843, 
p. 62. 
Cyclophorus semisulcatus, Pfeiffer. 
Hab. Malacca. 
The linear blackish-brown band which encircles the spe- 
cies at the periphery remains prominent in varieties in 
which the freckled brown painting is almost obsolete. 
1861. 
