TROCHUS. 25 



its margin irregularly dentate or nearly smooth, usually with a deep 

 notch at its union with the basal lip ; umbilical tract funnel-shaped, 

 spirally feebly lirate or nearly smooth, not conspicuously bi-lirate. 



Alt. 45, diam. 38 mill. 



Philippines; Viti Is. ; Singapore; King&nill Id. ; Indian Ocean. 



T. macnlattis LINN., Syxt. Nat. x, p. 756. T. callicoccus PHILIPPI, 

 Zeitschr.f. Mai 1849, p. 150. (juv.) (pi. 9, fig. 33) T. ftus REEVE 

 (non Phil.) Conch. Icon., no. 13, 1862. T. yineUni JONAS, Zeitschr. 

 f. Mai., 1846, p. 123. f T. spengleri (CHEMNITZ et GMEL.) PHILIPPI, 

 Kust. Conch. Cab., p. 43, t. 9, f. 9. T. xmaragdus REEVE, Conch. 

 Icon. i. 12, f. 66. (pi. 9, f. 39) T. rngulosus KOCH, Zeitschr.f. Mai., 

 1848, p. 128 PHILIPPI, Conchyl, Cab., p. 217, t. 32, f. 6. T. acut- 

 angitln* MKNKI: in PHILIPPI, Conchyl. Cab., p. 101, t. 16, f. 12. (not 

 of Chemnitz). T. Jonasi PHILIPPI, Conchyl. Cab., p. 260, t. 38, f. 

 9, 10. 



This excessively variable form may be distinguished from its 

 allies when typically developed, by the more numerous series of 

 granules, more sharply carinated periphery, irregularly denticulate 

 columella, obsoletely spirally plicate umbilical tract, etc. After care- 

 fully studying a large series of specimens from many localities, I 

 am constrained to unite a number of forms heretofore considered 

 distinct. I have little doubt that T. creniferus, T. incrassatus, T. 

 fiammulatus and some other forms will finally prove to be included 

 in the range of variation of the protean maculatus. 



T. spongleri is a doubtful synonym. Vide T. sacellum Phil. 



Var. VERNUS Gmelin. PI. 9, fig. 99. 



A form in which the red and brown stripes are replaced by cold 

 brown and green ; the ground color is pure white or tinged with 

 bluish green. 



Trochus vernus Gmel., Syst. Nat. xiii, p. 3571 T. granosus Rve., 

 (non Lam.) Conch. Icon., sp. 97, 1862. 



Var. TENTORIUM Gmelin. PI. 7, figs. 66, 73. 



Differs from the type in being obviously longitudinally plicate, 

 especially on the lower part of each whorl. 



Philippines; Viti Is. 



T. tentorlum Gmel., Syst. Nat. xiii, p. 3571. 



Var. VERRUCOSA Gmelin. PL 7, figs. 64, 65. 



Similar to T. maculatus, but each whorl encircled around the 

 base by a series of prominent tubercles or short folds ; last whorl 



