TROCHUS. 73 



from a specimen with 16 series of granules upon the body-whorl. 

 The species is somewhat allied to T. ceylanicus, but is larger, less 

 conical, and has a different color-pattern. The large basal tooth 

 will separate it from other Mediterranean forms. I have not 

 thought it necessary to quote in the synonymy every author who has 

 written on this well-known species. 



T. ERUBESCENS Philippi. PI. 42, figs. 12, 13. 



Shell conoidal, white, radiate with red ; whorls slightly convex, 

 deeply separated by the suture, granulate, granules of the penul- 

 timate whorl in 5 to 6 series, 7 on the last, 12 to 14 on the base ; 

 false-umbilicus with a denticulate margin; aperture subrhomboidal ; 

 columella straight, denticulate above, subsolute, the margin crenula- 

 ted. (Philippi^ 



The shell is conoidal, somewhat broader than high, granulate. 

 The whorls are but slightly convex, but separated by a deep suture, 

 the lower ones with 5-6 rows of granules, of which the three upper 

 are crowded, the two lower wider apart. In the interstices there are 

 two elevated lines, which also become rows of granules at last. The 

 false-umbilicus is denticulate on its margin. The almost vertical 

 columella has a tooth above, and three denticles on the edge. The 

 outer lip is plicate within, but less obviously to the touch than to the 

 sight. The color is whitish with pale red flames. From T. kraussi 

 this species is distinguished by the more depressed shell, less convex 

 whorls, paler color and much more numerous series of granules of 

 the base. Alt. 11, diam. 14 mill. (Philippi.) 



Habitat unknown. 



T. erubescens PHILIPPI, Conchyl. Cab., p. 101, t. 16, f. 13. 



Seems to be a variety of T. kraussi. 

 T. BERTHELOTI d'Orbigny. PL 11, figs. 46, 47. 



Shell small, globose-conic, very similar in form to T. corallinus ; 

 yvhorls 5, acutely granose-lirate, brown, below the sutures more or 

 less maculated with blackish, base dotted with white ; last whorl en- 

 circled by 11 sharply granose ridges, those of the base profoundly 

 separated by deep grooves, wider than the ridges ; aperture as in T. 

 corallinus, but the tooth at base of columella more pointed, smaller. 



Alt. 6-8, diam. 8*-9 mill. 



Madeira, Azores and Canary Is. 



Monodonta bertheloti D'ORB., in Webb et Berthelot, Hist. Fat. des 

 Canaries, p. 81, t. 6, f. 17-20. Trochus bertheloti PHILIPPI, 

 Conchyl. Cab., t, 39, f. 17. FISCHER, Coq. Viv., p. 295, t. 95, f. 1. 



