TROCHU8. 77 



basal margin denticulate ; columella oblique, granulose without, 

 above contorted, truncated below ; umbilical area white, with an 

 interior spiral ridge, crenulated at margin ; columellar callous obso- 

 lete. Alt. 10, diam. 14 mill. (Fischer.) 



W. Coast Equatorial Africa ; Annabon Id. 



T. spadiceusPmL, Zeitschr.f. Mai. 1848, p. 125. Conchyl Cab., 

 p. 239, t. 36, f. 7. DUNKER, Lid. Moll. Guin. infer, coll. p. 17. t. 2, 

 f. 43-45. FISCHER, Coq. Viv., p. 390, t. 117, f. l. T. ludwigi 

 KRAUSS, Die. Sudaf. Moll. p. 99, t. 5, f. 33 (1848). PHILIPPI 

 Conchyl Cab., p. 323, t. 46, f. 5. 

 Allied to the preceding by the comparatively smooth shell. 



T. ludwigi Krauss (pi. 13, figs. 93, 94) seems to be an immature 

 form of spadicus, and if so probably has priority ; for the preface of 

 Die Sudaf. Moll, is dated January, 1848. The diagnosis of Krauss 

 is as follows : 



Shell obliquely conoidal, apex acute, umbilicate, roseate, sculpt- 

 ured with irregular delicate transverse striae, which are subgranulose 

 below the suture ; whorls 6, convex ; separated by subcanaliculate su- 

 tures, the last subangulate; base convex, striate, with two white-spotted 

 cinguli around the umbilicus ; umbilicus white, bounded by a prom- 

 inent margin ; columella oblique, solute above, unidentate, base (4 

 or 5) denticulate ; aperture rounded-rhomboidal ; lip acute, callous 

 and denticulate within. Alt. 2, 4, diam. 3 lines. (Krauss.) 



Cape of Good Hope. 



T. ATROPURPUREUS Gould. PL 15, figs. 50, 51 ; pi. 11, figs. 28-32; 



pi. 13, figs, 86-87. 



Shell depressed, conoid, umbilicate, dark purplish or ferrugineous 

 brown, unicolored, the apex carmine; whorls 6, convex, granose- 

 lirate, the sutures narrowly subcanaliculate, last whorl rounded at the 

 periphery, abruptly briefly deflected anteriorly, encircled by 16 or 

 17 finely, very regularly but feebly granose line, which are wider on 

 the base ; aperture rounded, outer and basal lips regularly curved 

 thickened and finely crenulated within ; columella deeply entering 

 the profound umbilicus, bearing a minute denticle above and at the 

 base ; umbilicus profound, smooth within, bordered and constricted 

 by a marginal rib bearing about four white teeth, the largest near 

 to the parietal wall of the aperture. Alt. 7, diam. 9 mill. 



Samoan and Viti Is.; Sorong, New Guinea; San Christoval, 

 Solomon Is.; Tutuila, Navigators' Is. 



