TURBO. 



very different species. One I have identified with the young 

 of T. cornutiis, which is a Japanese shell ; the other is the 

 species above described, which is not a Japanese but a 

 Mauritian shell. The two species have little in common, 

 and it is somewhat surprising that they should have been 

 confounded. — Hab. Mauritius (Eobillard). 



22. BicoLOR, pi. iv. f. 33, Sowerby, Thes. Conch. — Testa 

 ovato-conica, solidiuscula, imperforata, lutescente-alba, luteo- 

 fusco late oblique radiata ; spira acuta, mediocriter elata ; 

 sutura anguste impressa; anfractus 6, superne declives, delude 

 leviter angulati, undique concentrice minutissime striato- 

 laminati, costis niunerosis irregularibus fere parviusculis, ad 

 basin majoribus spiraliter cingulati; apertura subcircularis ; 

 peristoma simplex ; columella arcuata, convexiuscula, ad 

 basin vix effusa, longitudinaliter plicata. Operculum crassum, 

 extus convexum, viridulum lusco-tinctum, granulosum. — In 

 the only specimen I have met with of this species, the broad 

 brown oblique rays are very clearly defined upon a whitish 

 ground ; the longitudinal strioe form minute laminar ridges, 

 the suture is narrowly impressed, not broadly channeled as 

 in T. foliaceus. — Hab. — ? 



23. PULCHER, pi. iv. f. ^8, Reeve, Proc. Zool. Soc. 1842, 

 p. 185. — Testa conico-ovata, subperforata, luteo-spadicea et 

 viridula, lineis nigricantibus undulatis longitudinaliter picta ; 

 spira elata, acuta ; anfractus superne concaviusculi, deinde 

 convexi, spiraliter irregulariter lirati ; liris numerosis, alter- 

 natim minor ibus, interstitiisque subtilissime crispato-lami- 

 natis ; apertura subcircularis *, labrum crenulatum ; columella 

 vix arcuata, attenuata, ad basin latiuscula. Operculum extus 

 mediocriter convexum, peculiariter cristatum. — An easily 

 recognised species, principally characterised by a crisply 

 laminated surface, and dark longitudinal waved lines. The 

 operculum is very like that of T. sarmaticus. — Hab. North 

 Australia. — This species presents one of the difficulties of 

 subdivision. Judged by the shell it is a Senectus, and by 

 the operculum a Sarmaticus. 



24. Spenglerianus, pi. iv. f. 39, Gmelin, Syst. Nat. 

 p. 3595. — Testa ovata, imperforata, rosaceo-spadicea, maculis 

 punctisque fuscescentibus nebulata, nitens ; spira elata ; 

 sutura late et profunde canaliculata ; anfractus rotundati, 

 plerumque spiraliter sulcati ; apertura subcircularis. — A 



