CALLIOSTOMA. 349 



May be a Thalotia, allied to T. pyrgos, one of Philippi's own 

 species. 



C. DFCORATA Philippi. PL 66, fig. 31. 



Shell turreted-conical, imperforate, brownish-ashen ; whorls 9, 

 nearly plane, with an elevated cingulus above and below, cut into 

 granules by impressed longitudinal and transverse lines, encircled 

 by three series of granules on a reddish-brown ground, the granules 

 alternately white and black ; the interstices have one or two elevated 

 lines. Angle of the last whorl rounded, base pretty convex, with 

 about 8 elevated weakly granulated concentric lira?, the granules 

 alternately whitish and dark brown. Columella somewhat oblique, 

 subtruncate at base, obviously separated from the basal lip by a 

 siiuis. Alt. 20, diarn. 15 mill. (Phil) 



Port Jackson and Brisbane, Australia. 



Tr. decoratus PHIL., Zeitschr. f. Mai. 1846, p. 102 ; Ccnchyl. Cab., 

 p. 59, t. 13, f. 1. Ziziphinus decoratus Phil. REEVE, Conch. Icon., f. 

 28. ANGAS, P. Z. S. 1877, p. 188. Tr. (Zizyphinus) decoratus Phil., 

 WATSON, Challenger Gasterop., p. 54. Tr. (Calliostoma) decor- 

 atus E. A. SMITH, Zool. Coll. H. M. S. 'Alert,' p. 73. 



Smith says : The interior of the aperture of this species, close to 

 the outer and basal margin, is thickened with a whitish and more or 

 less cloudy pearly deposit, which conceals to some extent the beautiful 

 iridescence observable further within. 



C. NOBILIS Philippi. PI. 15, figs. 47, 48, 49. 



Shell imperforate, acutely conical, rather thin ; whorls 10, plane, 

 the first eroded, smooth, following whitish buff, radiately flamed with 

 brown and reddish, spirally cingulate, cinguli 6, granose, the upper 

 5 small, separated by equal interstices, lower cingulus wider, more 

 prominent, subcrenate ; last whorl acutely carinated ; base con- 

 centrically encircled by about 7-8 granose cinguli, alternately buff 

 and rose colored ; aperture subquadrate ; lip plicate ; columella sub- 

 arcuate, base subnodose, with a parallel groove. 



Alt. 22, diam. 22 mill. (Fischer.) 



Australian coasts ; Swan River ; St. Vincent's Gulf, Darnley Id., 

 Torres Sts., 25 fms. 



T. nobilis PHILIPPI Conchyl. Cab., p. 86, t. 15, f. 6, t. 38, f. 1. 

 FISCHER Coq. Viv., p. 309, t. 98, f. 2. Ziziphinus nobilis Phil. 

 REEVE, Conch. Icon., f. 10. BRAZIER, Proc. Linn. Soc. N. S. Wales, 

 ii, p. 44, 1878. Tr. rubiginosus VALENCIENNES, Voy. de la Venus, 



