CYCLOPHORUS. 
Puate XX. 
Species 99. (Mus. Benson.) 
CycLornorus Mortcanpi. Cycl. testd perspective um- 
bilicatd, depresso-turbinatd, opaco-albidd, epidermide 
fuscescente decidua; anfractibus rotundatis, trans- 
versim filoso-striatis, ultimo versus aperturam dis- 
juncto ; apertura circulari, labro simplict, 
Moricanp’s CyciopHorus. Shell perspectively um- 
bilicated, depressly turbinated, opake-white, with a 
deciduous brownish epidermis; whorls rounded, 
transversely thread-striated, the last disjomed to- 
wards the aperture; aperture circular, lip simple. 
Preirrer, Gray, Brit. Mus. Cat. Phanerop. p. 71. 
Cyclostoma disjunctum, Moricand (not of Morelet). 
Cyclopoma disjunctum, Troschel. 
Cyclophorus disjunctus, Pfeiffer. 
Hab. Bahia, Brazil. 
A small loosely coiled species, in which the last whorl, 
before reaching maturity, is quite detached from the pe- 
nultimate whorl. 
Species 100. (Mus. Benson.) 
CYCLOPHORUS LIRIcINCTUS. Cel. testd excavato-wm- 
bilicatd, orbiculari-depressd, albidd ; anfractibus spi- 
raliter validé liratis et sulcatis, juxta suturas con- 
caviusculis ; apertura parva, circulari, labro simplici. 
THE RIDGE-ENCIRCLED CycLoruorus. Shell excavately 
umbilicated, orbicularly depressed, whitish ; whorls 
spirally strongly ridged and grooved, rather concave 
next the sutures; aperture small, circular, lip simple. 
Cyclostoma liricinctum, Benson, Ann. and Mag. Nat. Hist. 
1853, vol. xi. p. 106. 
Cyclophorus liricinctus, Pfeiffer. 
Hab. Shores of Swan River, Western Australia; Bacon. 
This little Australian species is of a quite distinct type. 
The spiral ridges are not delicate raised lines like those 
which characterize the little Borneo @. ¢riliratus, but 
strongly sculptured ridges with the interstices between them 
flatly grooved. 
Species 101. (Mus. Benson.) 
CYCLOPHORUS ORBICULATUS.  Cycl. testdé excavato-um- 
bilicatd, orbiculari-depressd, albidé; anfractibus ad 
suturas et circa umbilicum spiraliter liratis et sul- 
catis, medio levibus ; aperturd parva, circulari, labro 
simplici. 
THE oRBICULAR CycLopnorus. Shell excavately um- 
bilicated, orbicularly depressed, whitish ; whorls 
spirally ridged and grooved at the sutures and around 
the umbilicus, smooth between; aperture small, cir- 
cular, lip simple. 
Cyclostoma orbiculatum, Benson, Ann. and Mag. Nat. 
Hist. 1853, vol. xi. p. 106. 
Cyclophorus orbiculatus, Pfeiffer. 
Hab. Shores of Swan River, Western Australia ; Bacon. 
I doubt if this is anything more than a smooth variety 
of the preceding species collected at the same time in the 
same locality ; there are obvious traces of the spiral grooves 
and ridges, and next the suture and around the umbilicus 
they are more defined. A further supply of specimens is 
needed to determine the question. 
Species 102. (Fig. a, 4, Mus. Benson.) 
CycLopHorus RAvIDUS. Cycl. testd ampliter perspective 
umbilicatd, orbiculari-depressd, subdiscoided, lutescente- 
olivaced ; anfractibus subangustis, rotundatis, trans- 
versim dens? capillaceo-striatis, striis subcorrugatis ; 
apertura oblique circulari, labro simplici. 
THE YELLOWISH CycLopHorus. Shell largely perspec- 
tively umbilicated, orbicularly depressed, nearly dis- 
coid, yellowish-olive; whorls rather narrow, ronnded, 
transversely densely hair-striated, strie slightly 
wrinkled ; aperture obliquely circular, lip simple. 
Cyclostoma ravidum, Benson, Ann. and Mag. Nat. Hist. 
1851, vol. viii. p. 190. 
Cyclophorus ravidus, Pfeiffer. 
Hab. Neilgherry Hills, India; Jerdon. 
This is quite distinct from the Ceylon C. aunulatus and 
the numerous varieties of it which have been regarded as 
species. The whorls are not so narrow, and the shell is 
less openly umbilicated. 
Species 103. (Fig. a, 6, Mus. Benson.) 
CYCLOPHORUS PINNULIFER. 
umbilicatd, depressd, subdiscoided, lutescente, maculis 
Cycl. testé ampliter patente 
castaneis radiata ; anfractibus angustis, subrapide cre- 
scentibus, rotundatis, transversim dens? filoso-striatis : 
August, 1861. 
