GIBBULA. 239 



A small form, distinct from other Cape Gibbula in its fasciate 

 color-pattern. There is great variation in the prominence of the 

 spiral caringe. Lischke classes it as a Photimda, and it certainly 

 bears a considerable resemblance to that group. 



G. CAPENSis Gmelin. PI 31, figs. 36, 37. 



Shell narrowly umbilicated, conoid-depressed, whorls 5, the first 

 roseate, eroded, the following convex above, depressed beneath, 

 whitish or rosy, flamniulate with brownish-violet radiating macula- 

 tions, obliquely striate and spirally lirate, the lirae flat, narrow, not 

 granose ; last whorl dilated, subangulate above, depresso-carinated 

 at the periphery, convex beneath and ornamented with 9 concentric 

 reddish lirse ; aperture oblique, subquadrate ; lip simple ; columella 

 arcuate, denticulate at base, slightly calloused above, almost cover- 

 ing the umbilicus. Alt. 12, diam. 17 mill. (Fischer.) 



Cape of Good Hope. 



T. capensis Gmel. Syst. Nat. xiii, p. 3573. — Krauss, Die Sudaf. 

 Moll., p. 100.— Philippi, Conchyl. Cab. p. 196, t. 29, f 22.— 

 Fischer, Coq. Viv. p. 311, t. 98, f. 3. 



A conical flat-based species, often more decidedly radiately striped 

 than the figures represent. 



G. TRYONi Pilsbry. PI. 69, figs. 20, 21. 



Shell conical, umbilicate, rather thin, crimson or purplish red, ob- 

 scurely, rather finely mottled with arrow-shaped whitish dots, usually 

 with several narrow articulated lines on the base, and in the middle of 

 the upper surface of the last whorl ; apical whorls eroded, yellow ; 

 spire conic ; whorls 5, a little tumid below each suture, and with a 

 narrow ledge or margin, marked off by an impressed line, above 

 each suture. This peripheral ledge gives the last whorl a rather 

 prominent keel ; the surface is polished, but shows quite prominent, 

 spaced, impressed growth-lines, and under a lens is all over very 

 densely minutely spirally striate; the base is flattened, rather 

 prominent around the umbilicus ; aperture oblique, quadrangular, 

 smooth and with a very brilliantly iridescent green nacre inside ; 

 columella arcuate above and expanded partly over the umbilicus ; 

 parietal wall free from callus ; umbilicus deep, with a narrow 

 rapidly tapering 2:)erforation, but broad and funnel-shaped at the 

 opening. Alt. 12, diam. 14 mill.; alt. 13, diam. 132 mill. 



Cape of Good Hope. 



