] 92 TURBO. 



stronger nodose carina above; aperture large, pearly within, base 

 produced, columellar region more or less excavated. Alt. 100-200 

 mill. Indian Ocean; Philippines; Seychelles; Japan, etc. 



T. regenfussiVhW., not Desli., and T. olearius Gmel. are synonyms. 



Operculum (PI. 59, fig, 21 ) subcircular, somewhat concave within, 

 exterior closely tuberculate, whitish. 



T. iMPERiALis Gmel, 1788. PI. 43, fig. 53; PI. 62, fig. 8. 



Shell large, globose-conic, ventricose, imperforate, solid, green, 

 irregularly mottled and spirally striped with chestnut, closely 

 irregularly striate with the same color; whorls 6-7 convex, with 

 well marked sutures, and numerous more or less conspicuous revolv- 

 ing furrows; last whorl large, somewhat flattened above; aperture 

 subcircular, pearly white within; outer lip rather thin; columella 

 arched, with a pearly callus, which reappears at the posterior angle; 

 parietal wall nearly devoid of callus, green ; base slightly dilated, 

 scarcely produced. Alt. 75-100, diam. 70-90 mill. 



Indian Ocean ; China Se<(S. 



Most specimens have less prominent i*evolviug wrinkles than the 

 figure, and some occur almost smooth. Perhaps Reeve's figure, 

 copied in my fig. 53, is a form of T. marmoratus. 



Operculum circular, flat inside, with four whorls and subcentral 

 nucleus; outside convex, partly granulose, pale brownish olive. 



T.VouRDANi Kiener, 1839. PI. 49, fig. 53. 



Shell large, ovate-conic, solid, imperforate; epidermis castaneous 

 or olive ; spire acute ; whorls 8, rounded, regularly increasing, the 

 upper ones 1-3-carinate, the lower transversely obsoletely lirate, 

 the last large, ventricose, descending, nearly smooth, or with wide 

 spiral cost?e; aperture circular, white within, outer lip thin, colu- 

 mella arcuate, not expanded at base. Alt. 140-210, diam. 110-170 

 mill. Australia. 



T. MAGNiFicus Jonas, 1844. PI. 40, fig. 13. 



Shell ovate-conic, turgid, imperforate, brownish, maculated and 

 marbled with violaceous; whorls 6, rounded, finely transversely 

 striate, the upper ones obscurely ungulate in the middle, the last 

 obtuse; spire a little exserted, suture distinct, linear; aperture large, 

 circular, pearly within, opaque at margin ; columella cylindrical, 

 callous above. Alt. 63, diam. 60 mill. 



Bay of Sechura, Peru, in fomieen fins. 



I have not seen this s])ecies. 



