CYCLOPHORUS.—Ptiate XIII. 
Hab. Island of Pulo-Penang, west coast of Malacca; 
Dr. Cantor. 
The specimen of (. Cantori here figured is the original 
type collected by Dr. Cantor, and described by Mr. Ben- 
son in 1851. The shells of much larger size in Mr. Cum- 
ing’s collection referred to ©. Cantori by Dr. Peiffer, ap- 
pear to me to be a distinct species, see C. Pfeifferi, pl. 3. 
te WIL, @. 
Species 55. (Fig. a, 6, Mus. Benson.) 
CycLopHorus aLrivaaus. Cycl. testd angusteé subobtecte 
umbilicatd, globoso-turbinatd, albidd, rufo-fusco plus 
minus tinctd et nebuloso-flammatd, infra peripheriam 
saturatiore, circa umbilicum lineata ; anfractibus spi- 
raliler liratis et striatis, tumidiusculis, supra plano- 
declivibus, deinde rotundatis ; apertura subcircular:, 
labro tenue reflexo, juxta umbilicum sublingulato. 
THE LOFTY-WANDERING CycLopHorus. Shell with a 
narrow rather covered umbilicus, globosely turbi- 
nated, whitish, more or less stained, and cloudedly 
flamed with red-brown, darker below the periphery, 
lineated around the umbilicus ; whorls spirally ridged 
and striated, rather swollen, flatly sloping above, 
then rounded; aperture nearly circular, lip thinly re- 
flected, slightly tongued next the umbilicus. 
Benson, Ann. and Mag. Nat. Hist. 1854, vol. xiv. p. 411. 
Hab. Mahabuleshwar Hills, south of Poonah, Hindoo- 
stan; Lieut. A. E. Benson. 
The principle of natural selection, which Dr. Hooker 
inclines to apply, after the manner of Darwin, to the plants 
of the country of the Cyclophori, would not allow of C. 
altivagus and C. exul being regarded as species distinct 
from C. aurora. The theorists in that direction might 
even go further, and say that CO. pyrotrema, stenomphalum, 
and Indicus were only so many more modifications of the 
same species. We give them guantwm valeant; it re- 
mains for a future and wiser generation to settle the diffi- 
culties in regard to the determination of kind, which is 
turning the heads of some of our most able naturalists. 
Species 56. (Mus. Cuming.) 
CycLopHorus LEucostoma. Cyel. testdé modicé umbili- 
catd, subdepresso-turbinatd, ferrugineo-fuscd, supra 
albo fulguraté ; anfractibus subangustis, rotundatis, 
spiraliter liratis et striatis ; apertura circulari, labro 
parum reflexo. 
THE WHITE-MoUTH CycLopHorus. Shell moderately 
umbilicated, rather depressly turbinated, rust-brown, 
lightning-marked with white about the upper part ; 
whorls rather narrow, rounded, spirally ridged and 
striated ; aperture circular, lip but little reflected. 
PrErFFrEeR, Monog. p. 73. 
Hab. ? 
This shell has a strong relationship with C’. validus, and 
nothing is known of its habitat. 
Species 57. (Mus. Cuming.) 
CycLopHorus TURBO. Cyel. testd imperforatd, Trochi- 
Jormi, solidd, rufescente-albd, fusco undique lentigi- 
nosa ; anfractibus levibus, declivi-convexis, ultimo ad 
peripheriam tenuicarinato, subtus planulato ; apertura 
subquadrata, labro incrassato, aurantio tincto, margini- 
bus callosis, remotis, columellari in laminam appressam 
expanso, interdum in tuberculum desinente. 
THE Top CycLopHorus. Shell imperforate, Trochus- 
shaped, solid, reddish-white, everywhere freckled with 
brown; whorls smooth, slopingly convex, the last 
thinly keeled at the periphery, flattened beneath ; 
aperture somewhat square, lip thickened, tinged with 
orange, margins callous, removed, columellar margin 
expanded into an appressed lamina, sometimes end- 
ing in a tubercle. 
Trochus turbo, Chemnitz, Conch. Cab. vol. il. part ii. p. 53. 
pl. 122. f. 1059. 
Helix turbo, Gmelin. 
Cyclostoma turbo, Say. 
Cyclophorus turbo, Pfeiffer. 
Cyclophorus Nicobaricus, Behn. 
Hab. Tranquebar, Nicobar, Sumatra. 
Well distinguished by its solid trochiform shape and 
callous columellar margin projected across and entirely 
filling up the seat of the umbilicus. 
