204 TURBO. 



olivacea vel viridula, rufo radiatim maculata et punctata ; 

 anfractus 5 convex!, spiraliter costati ; costis numerosis, 

 rotundatis ; apertura subobliqua, rotundata. Operculum 

 extus album, peculiariter cristatum. — In appearance some- 

 what like T. cidaris, but differing in being- spirally ribbed, 

 and in having an operculum like that of T. sar^naticus. — - 

 Hab. South Africa. 



Section 5. Lunella. 



45. POKCATUS, pi. vi. f. 49, 50, Reeve, Conch. Icon., sp. 

 52. — Testa orbicularis, profunde umbilicata, viridis, rufo- 

 olivaceo nitide marmorata; spira depressiuscula, sutura 

 excavata; anfractus subangulati; costis elevatis rotundatis 

 minute crenulatis (lira minuta interveniente), spiraliter 

 cingulati ; anfractus ultimus ad basin productus ; apertura 

 circularis ; labrum crenulatum ; columella attenuata, ad 

 basin producta, effusa. Operculum circulare, extus valide 

 eonvexum viridula, minutissime granulatum. — Allied to 

 Turbo mesjjilus, but distinguished by its strongly-ribbed 

 growth. — Hab. North Australia. 



46. UNDULATUS, pi. V. f. 42, Martyn, Univ. Conch. ; 

 Chemnitz, Conch. Cab. — Testa orbicularis, late et profunde 

 umbilicata, albida, strigis ca^ruleo-viridis undulatis longi- 

 tudinaliter picta, epidermide olivacea induta; anfractus 5, 

 superne subangulati, deinde rotundati, interdum spiraliter 

 sulcati ; apertura subcircularis ; columella leviter depressa. 

 Operculum extus eonvexum, albidum, medio obsolete gra- 

 nulosum, ad peripheriam costa marginali munitum. This 

 species, like the last, varies from smooth to grooved or 

 ribbed. — Hab. New Zealand. 



47. MESPiLUS, pi. V. f. 40, 41, 45, Gmelin, Syst. Nat. (1 3th 

 edit.), p. 3601 — porphyrites, Gmelin — versicolor, Omelin 

 — lugubris, Kiener. — Testa suborbicularis, Isevigata vel 

 spiraliter costata, vel sulcata, profunde umbilicata, viridula, 

 olivaceo nebulosa et minute articulata, interdum fascia 

 angusta lutea medio cingulata, interdum zonis angustis 

 spiralibus viridi-articulatis picta ; spira depressa ; anfractus 

 convexi, vix angulati ; anfr. ultimus inferne leviter pro- 

 ductus ; apertura circularis ; peristoma simplex ; columella 

 planulata, ad basin effusa et producta. Operculum circulare, 

 extus valde eonvexum, nitens, partim albidum, partim 



