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 carinse. Lischke classes it as a Photinula, 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, flammulate with brownish-violet radiating macula- 

 tions, obliquely striate and spirally lirate, the lira? 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 decidediy radiately striped 

 than the figures represent. 



G. TRYONI Pilsbry. PL 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 perforation, but broad and funnel-shaped at the 

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



Cape of Good Hope. 



