34 TROCHUS. 



T, SACELLUM Pliilippi. 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 costa?, sixth composed of spiniform tubulose tuber- 

 cles alternating with simple grains ; last whorl carinated, creuulated 

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

 and red variegated, concentrically lirate, lira? granose, equal, about 

 8 in number, separated by concentrically striate interstices ; aperture 

 rhoniboidal, lirate within; columella plicate-dentate; umbilical 

 area white, sj)ira]ly sulcate. Alt. 17, diani. 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. PL 6, fig. 57. 



Short, red, the peripheral tubercles less developed. 



Luzon, PhiVqjpines. (Cuming.) 



T. sacellum Reeve, Conch. Icon., t. xiv, f. 78. — Var. fi (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. /S. jyhilippinarum is neai'ly synomymous with the typical 

 spengleri. My reason for not ado[)ting 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, perforatum, 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. Ca6. II, p. 43, t. 9, 

 f. 9. — Lischke Jap. meeres- conchyl. p. 93. 



( Var. A. periphery with obtuse nodes.) 

 ^'Trochidi pyramldales umbilicati," etc, (in part) Chemnitz, 

 Conchyl. Cab., p. 100, t. 170, f. 1653. — Trochus pijramis fi, Gmelin, 

 Syst. Nat. J xiii, p. 3573, no. 39, — T. spengleri var. /5, Philippi, 



