CYCLOS 
PLATE 
Species 11. (Fig. a, 6, Mus. Cuming.) 
CycLostoma RuGosuM. Cycl. testd globoso-turbinatda, 
solidiusculd, carneo-grised, fascid angustad rufo-fuscd 
infra peripheriam, anfractibus convexis, supernée sub- 
profuse carino-liratis, inferné impresso-striatis, ultimo 
circa umbilicum angulato-excavato et validé carino- 
lirato ; apertura circulari, parviusculd, labro parum 
reflexo. 
THr roucH Cyctostoma. Shell globosely turbinated, 
rather solid, flesh-grey, with a narrow red-brown band 
beneath the periphery, whorls convex, rather pro- 
fusely keel-ridged round the upper part, impressly 
striated round the lower, last whorl angularly exca- 
vated and strongly keel-ridged around the umbilicus ; 
aperture circular, rather small, lip reflected. 
Lamarck, Anim. sans vert. vol. vill. p. 356. 
Hab. ——? 
Well characterized by its angularly excavated keel- 
ridged umbilicus. 
Fig. 12. (Fig. a, 6, Mus. Cuming.) 
The shell here figured is the type of Mr. Sowerby’s 
C. Harveyanum, which proves ‘to be a pale variety of C. 
asperum, Potiez and Michaud, Species 15. 
Species 13. (Fig. a, 6, Mus. Cuming.) 
CycLostoMa CALCAREUM. Cycl. testd globoso-conicd, 
solidd, calcareo-albd, anfractibus rotundatis, undique 
spiraliter liratis, iris regularibus, alternatim validi- 
oribus ; apertura circulari, labro subreflexo. 
THE cHALK CycLostoma. Shell globosely conical, solid, 
chalk-white, whorls rounded, spirally ridged through- 
out, ridges regular, alternately stronger; aperture 
circular, lip slightly reflected. 
Sowersy, Thes. Conch. p. 118. pl. 26. f. 113. 
Cyclostoma sulcatum, Lamarck (not of Draparnaud). 
Tropidophora calcarea, Gray. 
Hab. ? 
This species appears to be naturally of a dead chalk- 
white substance, elegantly sculptured throughout with 
neat alternately enlarged ridges. 
ORMEAS: 
Il. 
Species 14. (Fig. a, 6, Mus. Cuming.) 
CYCLOSTOMA APLUSTRE. 
cata, globoso-turbinatd, depressiusculd, tenui, carneo- 
albidd, violaceo-fusco supra peripheriam fasciatd, an- 
JSractibus juata suturas subplanulatis, deinde rotunda- 
tis, undique minute reticulato-decussatis ; apertura 
Cycl. testa subampliter umbili- 
circulari, parviusculd, labro parum reflexo. 
Tue FLAG CycLostoma. Shell rather largely umbilicated, 
globosely turbinated, rather depressed, thin, flesh- 
white, profusely banded above the periphery with 
violet-brown; whorls rather flat next the sutures, 
then rounded, everywhere minutely reticulately de- 
cussated. 
Sowersy, Pro. Zool. Soc. 1849, p. 15. pl. 2. f. 4, 5. 
Tropidophora aplustris, Gray. 
Hab. Madagascar. 
A delicately painted shell of light structure, with a 
deep perspective umbilicus. 
Species 15. (Fig. a, 6, Mus. Cuming.) 
CYCLOSTOMA ASPERUM. Cycl. testd modicé umbilicatd, 
globoso-turbinatd, carneo-grised, ferrugineo tinctd, fas- 
cid purpureo-castaned infra peripheriam ; anfractibus 
rotundatis, undique conspicué liratis, interstitiis sca- 
broso-striatis ; aperturd oblique circulari, fauce pur- 
pureo-ferrugined, labro reflexo, marginibus postice sub- 
ascendentibus. 
THE rouGH CycLostoma. Shell moderately umbilicated, 
globosely turbinated, flesh-grey, tinged with rust, 
with a purple-chestnut band below the periphery ; 
whorls rounded, conspicuously ridged throughout, 
interstices scabrously striated; aperture obliquely 
circular, interior purple-rust, lip reflected, margins a 
little ascending posteriorly. 
Potrez and Micuaup, Gal. Douai, vol. i. p. 233. pl. 23. 
f. 15, 16. 
Cyclostoma Harveyanum, Sowerby. 
Tropidophora aspera, Gray. 
Hab. Madagascar. 
The transverse striz are often so strong in this species 
as to give a scabrous character to the interstices between 
the ridges. 
November, 1861. 
