CYCLOPHORUS.—Puate V. 
chestnut-brown, than the specimen here figured, which is, 
however, a very characteristic form of it, collected by Mr. 
Thwaites in Ceylon. 
Species 21. (Fig. a, 6, Mus. Cuming.) 
CycLosToMA PERDIX. Cycl. testd excavato-umbilicata, 
subdepresso-turbinatd, albidéa, fulwo-castaneo undique 
reticulato-lentiginosd, infra peripheriam obscure fas- 
ciata, anfractibus subangustis, undique granoso-striatis 
et malleatis, juxta suturas subplanulatis, deinde rotun- 
datis, ad peripheriam interdum obscure carinatis ; aper- 
turd oblique circulari, labro expanso-reflero, haud 
continuo, nunc albo, nunc aurantio. 
THE PARTRIDGE CycLostoma. Shell excavately umbili- 
cated, rather depressly turbinated, whitish, reticu- 
lately freckled throughout with fulvous-chestnut, ob- 
securely banded beneath the periphery, whorls rather 
narrow, granosely striated and malleated throughout, 
slightly flattened next the sutures, then rounded, 
sometimes obscurely keeled at the periphery; aper- 
ture obliquely circular, lip expandedly reflected, not 
continuous, sometimes white, sometimes orange. 
Cyclostoma perdix, Broderip and Sowerby, Zool. Journ. 
vol. v. p. 50. 
Cyclosioma variegatum, Valenciennes. 
Cyclophorus perdix, Pfeiffer. 
Cyclostoma Zollingeri, Mousson. 
Cyclophorus Zollingeri, Pfeiffer. 
Cyclostoma porphyriticum, Benson. 
Cyclophorus porphyriticus, Pfeiffer. 
Hab. Java; Mousson. Hast coast of Bay of Bengal. Pulo— 
Penang; Benson. 
This very pretty species may be chiefly recognized by 
the neat reticulated character of its painting. 
