56 TROCHUS. 



of the section Clanculus. The granules of the upper surface are 

 hemispherical, regular, rather separated, and stand in 6 rows ; on the 

 base they are less distinct and in 10 rows ; the interstices are as wide 

 as the granules ; the close incremental striae with which they are 

 marked give them a very pretty appearance. The aperture and 

 umbilicus show nothing characteristic. Alt. 12, diam. 17 mill. 



Habitat unknown. 



Distinguished from T. anus and T. personatus by the number of 

 lirse on the base ; from T. flagellatus by the flat base, sharply cari- 

 nated last whorl, etc. 



T. morum Phil., Zeitschr.f. Mai. 1848, p. 109. — Conchyl. Cab. p. 

 265, t. 39, f. 5. 



Another species autoptically unknown to me, and not mentioned 

 by authors except Philippi. His description and remarks are above 

 translated in full. Compare T. floridus, T, clangulus and the forms 

 mentioned by Philippi. 



T. PERSONATUS Philippi. PI. 14, figs. 29, 30. pi. 19, figs. 91, 92. 



Shell low conical, heavy, solid, umbilicated, carinated, white, or 

 scuffused with a faint rose tint, with a series of small rose-colored 

 maculations above the periphery and sometimes at the suture, base 

 white or faintly marked with rose around the outer border ; whorls 

 about 5, slightly convex, separated by subcanaliculate sutures ; out- 

 lines of spire a little convex ; first two whorls smooth, eroded, the 

 following granose-lirate, the penultimate with 5 or 6, the last with 

 11 or 12 series of very distinct rounded granules, the 5th or 6th 

 forming the periphery, the interstices decussated by fine oblique and 

 spiral striulte, which are sometimes obsolete ; last whorl carinated at 

 the periphery, slightly deflected toward the aperture, and much 

 flattened there ; base a trifle convex, the middle portion concave 

 toward the umbilicus ; aperture tetragonal, very oblique, the upper lip 

 straight, bearing a strong tubercular tooth midway ; outer and basal 

 lips well rounded, thickened and plicate-denticulate within, the basal 

 margin decidedly expanded and curved; columella very oblique, 

 concave toward the insertion, its edge scarcely reflexed, simple, bear- 

 ing a single triangular projection or tooth below the middle, and 

 terminating in a very strong, quadrate, biplicate tooth at base ; 

 l^arietal wall wrinkled ; umbilicus penetrating deeper than the inser- 

 tion of the columella, bordered by a plicate rib, 



Alt. 10, diam. 14; alt. 10, diam. 12 mill. 



Australia. 



