CYCLOTUS. 



Plate VI. 



Species 2S. (Mus. Cuming.) 



Cyclotus projiinulus. Cycl. testa ampliter aperti 



umbilicatd, subdepressd, albidd, anfracfibus aiigustis, 



dense concentrice Jiloso-striatk, subfubutofii.\, utlimo 



plus minus soluto. 

 The produced Cyclotus. Shell largely openly umbi- 



licated, rather depressed, whitish, wiiorls narrow, 



densely concentrically thread-striated, subtubular, the 



last more or less unrolled. 

 Ci/clostoma prommulu7/i,¥missac; D'Orbigny, Voy. Amcr. 



Merid. p. 362. 



Cyclostoma Brasiliense, Sowerby. 



Ct/clotus Brasilieusis, Sowerby. 



Cyclotus prominulus, Pfeifter. 

 Ilnb. Rio Janeii'o, Minas Geraes ; Brazil. 



A delicate subtubnlai' shell, in which the last whorl is 

 partially uncoiled. 



Species 29. (Fig. a, b, Mus. Cuming.) 



Cyclotus vaeiegatus. Ci/cl. testa latissime apei-te um- 

 bilicatd, plauo-discoided, fuhescente, castaneo-brunneo 

 reticulato-picid, anfractibiis angustis, rotuudatis, con- 

 centrice dense filoso-striatis, labro reftexo, superne 

 subalafo. 



The variegated Cyclotus. Shell very broadly openly 

 umbUicated. flatly discoid, fulvous, reticidately painted 

 with chestnut-brown, whorls narrow, rounded, con- 

 centrically densely thread-striated, lip reflected, 

 slightly winged at the upjier part. 



Swainson, Treat. Malacol. p. 336. 



Cj/clostoma planorbnhim, Sowerby (not of Lamarck). 

 Cyclostoma corau-venaforiutn. Petit. 



Hall. Philippine Islands ; Cuming. 



This species partakes of the characters of Cyclophorus 

 and even of Pterocyclos. 



Species 30. (Pig. a, b, Mus. Cuming.) 



Cyclotus translucidus. Cycl. testa anyuste umbili- 

 catd, subconoided, pallidi; luted, fulvo interdum multi- 

 fasciatd, anfractibus declivi-rotundatis, dense concen- 

 trice rayoso-striatis. 



The tr.vnsparent Cyclotus. Shell narrowly umbili- 



cated, somewhat conoid, light yellow, sometimes 



many-banded with fulvous, whorls slopingly rounded. 



densely concentrically wrinkle-striated. 

 Cyclostoma translucidum, Sowerby, Pro. Zool. Soe. IS 13, 



p. 29. 



Cyclotus translucidus. Gray. 

 Hab. Cokunbia. 



A pale-yellow semitransparent shell, sometimes many- 

 banded with fulvous, in which the whorls are more closelv 

 convoluted than usual, and the shell is accordingly more 

 narrowly umbilicated. 



Species 31. (Fig. a, b, Mus. Cuming.) 



Cyclotus Dysoni. Cycl. testa profundi modice umbi- 

 licatd, depresso-conoided, luted, fulvo striijatd et fas- 

 ciatd, anfractibus prope suturas subplanatis, delude 

 declivi-rotundatis, tinditpie striis elevatis concentricis 

 decussatim undato-corrugatis. 



Dyson's Cyclotus. Shell deeply moderately umbili- 

 cated, depressly conoid, yellow, streaked and banded 

 with fulvous, whorls rather flat next the sutures, then 

 slopingly rounded, everywhere decussately wave- 

 wTinkled with concentric raised strise. 



Cyclostoma Dysoni, Pfeilfer, Pro. Zool. Soc. 1851, p. 243. 

 Cyclophorus ? Dysoni, PfeifFer. 

 Cyclotus Dysoni, Pfeifi^er. 



Hab. Honduras ; Dyson. 



The concentric thread-like strise are strongly wrinkled 

 in this species and incline to cross one another. 



Species 32. (Fig. u, b, Mus. Cuming.) 



Cyclotus Hebraicus. Cycl. testa modice prof unde um- 

 bilicatd, depressd, albidd, castaneo-brunneo fasciatd et 

 plus minus variegatd, anfractibus subangustis, rotun- 

 datis, Icevigatis, vel minutissime concentrice. slriatis, 

 labro ienue dilatato. 



The Hebrew Cyclotus. Shell moderately deeply um- 

 bilicated, depressed, whitish, banded and move or less 

 variegated with chestnut-brown, whorls rather nar- 

 row, rounded, smooth, or very minutely concentri- 

 trically striated, lip thinly dilated. 



Valvata Hebraicus, Lesson, Voy. de la Coquille, p. 347. 

 pi. 13. f. 8. 



August, 18C3. 



