CYCLOPHORUS.—Puare XVI. 
dually fading, last whorl transversely wrinkled around 
the umbilicus ; aperture obliquely circular, lip simple. 
Cyclostoma Bourcieri, Pfeiffer, Pro. Zool. Soc. 1852, 
p- 151. 
Cyclophorus Bourcieri, Pfeiffer. 
Hab. Vicinity of Mindo, Ecuador ; Bourcier. 
This species, named in honour of M. Bourcier, Consul- 
General of Quito, by whom it was collected, is distin- 
guished by a very characteristic wrinkling of the lower 
edge of the whorls, where they form the inner wall of the 
umbilicus. 
Species 75. (Fig. a, 6, Mus. Cuming.) 
CYCLOPHORUS LUTESCENS. Cycl. testd modicé umbilicatd, | 
orbiculari, depressiusculd, lutescente, s@pé virente 
tinctd ; anfractibus rotundatis, subinflatis, transversim 
decussatim corrugato-striatis, superne leviter impressis ; 
apertura fere circulari, labro simplici, superné sinuatd. 
Tur YELLOWISH CycLopHorus. Shell moderately um- 
bilicated, orbicular, rather depressed, yellowish, often 
stained with green; whorls rounded, a little inflated, 
transversely decussately wrinkle-striated, slightly im- 
pressed round the upper part ; aperture nearly circu- 
lar, lip simple, sinuated at the upper part. 
Cyclostoma lutescens, Pfeiffer, Pro. Zool. Soe. 1851, 
p. 250. 
Cyclophorus lutescens, Pfeiffer. 
Hab. Brazil. 
The colour of this species partakes more generally of a 
greenish than a yellowish hue. The whorls are rather 
more inflated and consequently more globosely coiled than 
in C. Bourcieri, and the surface is finely wrinkle-woven 
throughout. 
Species 76. (Mus. Cuming.) 
CycLopnorus TIARA. Cycl. testd subampliter profunde 
umbilicatd, depresse turbinatd, pellucido-albd ; anfrac- 
tibus subangustis, declivi-convexis, ad peripheriam 
obtuse angulatis, supra spiraliter liratis, infra levi- 
gatis ; apertura circulari, parviusculd, labro simplict. 
Tur TURBAN CycLopHorus. Shell rather largely deeply 
umbilicated, depressly turbinated, transparent white ; 
whorls rather narrow, slopingly convex, cbtusely an- 
gled at the periphery; spirally ridged above, smooth 
below. 
Cyclostoma tiara, Gould, Expedition Shells, pl. vii. f. 116. 
Cyclophorus tiara, Pfeiffer. 
| Hab. Upolu; Navigators’ Islands. 
The shell here figured is in a very bad state, and may 
have been at one time or other invested with a coloured 
epidermis. Its form and traces of sculpture are, however, 
too characteristic to be overlooked. The whorls are ob- 
tusely angled round their periphery, and above this they 
are corded with regular spiral ridges, while below it they 
are perfectly smooth. 
