TROCHUS. 37 



T. tricatenatus REEVE, Conch. Icon., f. 91. (1861.) 



The whorls of this species are encircled with three rows of bold 



wart-like grains, bound above and below by a narrow, transversely 



stretched chain. (Reeve.'} 



Compare T. sandwichensis, a species with which this may prove 



identical. 



Section INFUNDIBULUM (s. sir.) 



T. RADIATUS Gmel. PI. 8, figs. 88-93. 



Shell false-umbilicate, rather solid, conical, the spire with nearly 

 straight outlines, apex acute, generally eroded and orange-colored ; 

 whorls about 7, planulate, sometimes a little concave in the middle; 

 color whitish ; tinged with green, and radiately striped with broad 

 or narrow crimson flames, base white or pink, radiately marked or 

 minutely speckled with red; upper surface sculptured with granu- 

 lose spiral line, 5 or 6 on each whorl, uneven in size, the upper row 

 largest ; last whorl angulate at the periphery ; base nearly flat, con- 

 centrically Unite, the lint 1 granulose, rather coarse, with broad inter- 

 spaces, which are frequently occupied by revolving liruke or striae; 

 aperture large, subrhomboidal, lirate within ; basal lip thickened, 

 crenate ; columella oblique, strongly plicate above, its edge nearly 

 smooth ; umbilical tract funnel-shaped, rather broad, with a central 

 rib ; parietal wall scarcely callous, showing the color of the base, 

 and with a white spiral rib in the middle. 



Alt. 25, diam. 30 ; alt. 23, diam. 25 mill. 



Indian 0.; Red Sea; Singapore; Madagascar; Ceylon. 



T. radiatus GMEL., Syat. Nat. xiii, p. 3572, No. 33. PHILIPPI 

 Conch. Cab., p. 46, 1. 10, f. 6-8. REEVE, Conch. Icon.,f. 80. FISCHER 

 Coq. Viv., p. 304, t. 97, f. l.T. vividus REEVE, Conch. Icon., f. 72, 

 1861 (PI. 8, fig. 86). T. surgilfatus REEVE, Conch. Icon., f. 85 (pi. 

 42, fig. 8). T. festivus PHILIPPI, Conchyl. Cab., p. 116, t. 19, f. 5 

 (PI. 43, figs. 9, 10.) T. eiicosmus PHILIPPI, Zeitschr. f. mal. 1848, 

 p. 104, et Conchijl. Cab., p. 260, t. 38, f. 11. f T. nobilis PHILIPPI, 

 Conchyl. Cab., p. 86, t, 15, f. 6, ( T. gemmosus MKE., Spec. Moll. 

 Nov. Holl., p. 16, teste Philippi). / T. infnscatus PHILIPPI, Conchyl. 

 Cab., p. 329, t. 46, f. 15 (PL 43, figs. 2, 3). 



The conspicuously radiate color pattern and the sculpture, con- 

 sisting of coarse granulose line with interstitial lirulse both above 

 and below, as well as the wide umbilical tract and eroded corneous 

 or orange apex, will serve to distinguish this form. 



