CYCLOTUS.— Plate IX. 



livid-colour, whorls rounded, obsoletely transversely 



wrinkled. 

 Cijclusluma plebejum, Sowerby, Pro. Zool. Soc. 1843, 



p. 60. 



Aperontoma plebejiaUy Pfeifl'er. 



Ci/cloiiiH plebi'jas, Gray. 

 llab Island of Luzon, Pliilippines ; Cuming. 



A dull opake-white shell, stained with livid-colour, 

 showing traces on its surface of obtuse transverse wrinkles. 



Species 56. (Mus. Cuming.) 



Cyclotus Tr.\illii. Ci/cI. testa nwdice profundi um- 

 bilieatd, deprt'ssi orbicnlari, palUdi spadieed, purpu- 

 rascente-cadaneo liiictd el fasclatd, anfracfibiis ad mi' 

 fiiram impressis, midiqiw spii-aliter teiuiejilo-liratis. 



Traill's Cyclotds. Shell moderately deeply umbili- 

 cated, depressly orbicular, light fawn-colour, tinged 

 and banded with purple-che.stnut, whorls impressed 

 at the suture, spirally finely thread-ridged throughout. 



PrElFFER, MS. in Mus. Cuming. 



Ilalj, y 



A characteristic species, but it comes rather near to 

 C. snbdiscoideus. 



Species 57. (Mus. Cuming.) 



Cyclotus Macgillivrayi. Cycl. testa profiinde per- 

 spective mnbilicatd, obtuse conicd, solidiusculd, vivide 

 anrantio-nifd, anfraciibus dedivi-convexis, midique. 

 coiifertim filo-llratis, ad peripkeriam carinatis. 



Macgillivray's Cyclotus. Shell deeply perspectively 

 umbilicated, obtusely conical, rather solid, bright 

 orange-red, whorls slopingly convex, closely thread- 

 ridged throughout, keeled at the periphery. 



Ci/clustothu (Cyclotus) Macgillivrayi, Pfeifl'er, Pro. Zool. 

 Soc. 1855, p. 103. 

 Cyclotus Macijillivrayi, Pfeifl'er. 



Hub. New Hebrides and New Georgia ; Macgillivray. 



A rather solid obtusely conoid shell of a bright bronzy 

 orange-red colour. 



Species 58. (Mus. Cuming.) 



Cyclotus jiont.anus. Cycl. testa avguste pro/unde um- 

 biiicatd, depresso-conicd, teuui, alba, rosaceo-spadicto 

 obscure pmictatd et fusciatd, anfraciibus declivi-rotuu- 

 datis, undique spiraliler filo-liratis . 



The mountain Cyclotus. Shell narrowly deeply um- 

 bilicated, depressly conical, thin, white, obscurely 

 dotted and banded with pinkish fawn-colour, whorls 

 slopingly rounded, spirally thread-ridged throughout. 



Cyclustoma ■moutanmn, PfeifiTei", Pro. Zool. Soc. 1854, 

 p. 300. 

 Cyclotus montttUMs, Pfeifl'er. 



Hab. Neilgherry Hills, India. 



The colouring above described may probably be more 

 distinct in some specimens. 



Species 59. (Mus. Cuming.) 



Cyclotus conoideus. Cycl. testa anyuste umbilicald, 

 conoided, fulvd, purpureo-griseo tinctd, fascia angustd 

 castaned infra peripkeriam cingulatd, avfraclibus 

 spiraliler filo-striatis, ad peripheriani carinatis, ad 

 snturam plicatis. 



The conoid Cyclotus. Shell narrowly umbilicated, 

 conoid, fulvous, tinged with purple-grey, encircled 

 below the periphery with a narrow chestnut band, 

 wliorls spirally thread-striated, keeled at the peri- 

 phery, plicated at the suture. 



Cyclosioma spurcum, Sowerby (not of Grateloup). Pro. 

 Zool. Soc. 1843, p. 60. 

 Cyclosioma conoidemn, Pfeifl'er. 

 Tropidoplwra conoidea, Pfeifl'er. 

 Cyclotus conoideus. Gray. 



Hab. Mauritius and Seychelle Islands. 



The typical characters of the group to which this little 

 species belongs are developed in it with interesting full- 

 ness. 



