TROCHUS. 49 



Trochus pharaonius L. Syst. Nat., x, p. 757, no. 506. (and of 

 authors generally). Monodonta pharaonis WOODWARD, Man. of 

 Moll. pi. 10, f. 12. 



Specimens of a dark brown color, with alternating brown and 

 black series of granules above are before me. 



T. PUNICEUS Philippi. PI. 15, figs. 59-61, 



This form differs from pharaonius in being more finely granulate, 

 the last whorl bearing 20 or 21 cinguli, of which the 4th and 9th, as 

 well as one or two upon the base, are articulated with black ; balance 

 of shell coral red, or sometimes more or less articulated with white ; 

 last whorl more deflected anteriorly than in T. pharonius. 



Alt. 18-19, diam. 22-23 mill. 



Zanzibar. 



Monodonta punicea PHIL., Zeitschr.f. Mai., 1846, p. 100. Trochus 

 puniceus PHIL., Conchyl. Cab. p. 73, 1. 14, f. 2. FISCHER, Coq. Viv., 

 p. 167. Trochus pharaonis var. KIENER, Spec. Trochus, t. 56, f. la. 



T. FESTIVUS Tapparone-Canefri. PI. 14, fig. 18. 



Shell elevated-conoid, encircled by granose Iira3, base depressed ; 

 whorls depressed, slightly tumid below, separated by moderately 

 distinct sutures, ornamented with 5 unequal granulose cinguli on 

 the penultimate, 13 on the last whorl, the interstices sculptured with 

 oblique longitudinal stride, crossed by nearly obsolete spiral striae, 

 giving the shell a granulose appearance ; umbilicus small, its margin 

 dentate ; columella oblique, its edge reflexed, terminating in a plicate 

 tooth below; labrum dentate within, with a conspicuous tubercle 

 above ; color rosy-brown, (in specimens worn nearly smooth,) orna- 

 mented with rose, black and rarely white granules, except the first 

 and third cinguli, which are unicolored. 



Alt. 12, diam. 14 mill. (Tapparone-Canefri.) 



Bay of Bias, New Guinea. 



Clanculas festivus TAPP.-CAN., Zool. delviaggio delta fregata Mag- 

 enta, p. 58, t. 1, f. 10. (1874.) 



Differs from T. pharaonius in the less numerous spiral cinguli 

 (5 instead of 7 on the penultimate, 13 instead of 17-19 on the last 

 whorl,) by the coloration, etc. It is perhaps more nearly allied to the 

 group of T. stigmatarius than to T. pharaonius. The name festivus is 

 preoccupied by Philippi in Trochus. 

 4 



