34 TROCHUS. 



T. SACELLUM Philippi. PL 6, figs. 54, 57. 



Shell false-umbilicate, conical, thick, reddish, maculate with white ; 

 whorls about eight, obliquely striate, spirally cingulate, cinguli 

 numbering 6 on the penultimate whorl, the first (upper) large, com- 

 posed of tubercles confluent two by two ; second and third composed 

 of distinct tubercles, fourth and fifth have the tubercles connected, 

 forming radiating costee, sixth composed of spiniform tubulose tuber- 

 cles alternating with simple grains ; last whorl carinated, crenulated 

 at the periphery (by about 18 nodes), below plano-convex, white 

 and red variegated, concentrically lirate, line granose, equal, about 

 8 in number, separated by concentrically striate interstices ; aperture 

 rhomboidal, lirate within ; columella plicate-dentate ; umbilical 

 area white, spirally sulcate. Alt. 17, diam. 18 mill. (Fischer.) 



China ; Japan. 



T. sacellum PHIL., Conch. Cab. p. 309, t. 44, f. 13. REEVE, 

 Conch. Icon., f. 93. FISCHER, Coq. Viv. p. 412. 



Var. PHILIPPINARUM Fischer. PI. 6, fig. 57. 



Short, red, the peripheral tubercles less developed. 



Luzon, Philippines. (Cuming.) 



T. saeellnm REEVE, Conch. Icon., t. xiv, f. 78. Var. ft (T. philip- 

 pinarum FISCHER Coq. Viv. t. 120, f. 5. 



The T. sacellum is probably, as Lischke declares, merely a nodose 

 form of T. spengleri (Chemnitz) Gmel. If this be true, Dr. Fischer's 

 var. ft. philippinarum is nearly synomyrnous with the typical 

 spengleri. My reason for not adopting the latter name is that the" 

 figure of Chemnitz, copied by Philippi, is so very poor that one would 

 scarcely recognize it for the present species. Fig. 12, pi. 43, re- 

 presents the T. spengleri var. a of Lischke. The synomymy, if we 

 admit T. spengleri to be identical with the species under considera- 

 tion will stand as follows : 



(Typical form.) 



Trochus Spengleri grandinatus, perforatus, etc. CHEMNITZ, Conchyl. 

 Cab. v, p. 92,t. 169, f. 1631. (1781.) T. spengleri GMELIN, Syst. Nat. 

 xiii, p. 3571, no. 27. (1788.) PHILIPPI, Conchyl. Cab. II, p. 43, t. 9, 

 f. 9. LISCHKE Jap. meeres-conchyl. p. 93. 



( Var. A. periphery with obtuse nodes.) 



"Trochuli pyramidales umbilicati" etc, (in part) CHEMNITZ, 

 Conchyl. Cab., p. 100, t. 170, f. 1653. Trochus pyramis /5, GMELIN, 

 Syst. Nat., xiii, p. 3573, no. 39. T. spengleri var. /?, PHILIPPI, 



