228 GIBBULA. 



tessellated ; suture nearly filled by the first grauose ridge ; umbilicus 

 profound, wide, finely striate, lightly cingulate ; lip smooth, crenated 

 by the sulci of the outside; columella simple, arcuate, lamellar, 

 twisted at the umbilicus, forming a little canal at the base ; aperture 

 subrotund, whitish, rosy. Alt. 62, diam. 6 mill. (Caramagna.) 



Assab, on the Red Sea. 



G. dorice Caramagna, Bull. Soc. Mai. Ital. xiii, p. 127, t. 8, f 3 

 (1888). 



G. TAPPARONEi Caramagna. PI. 51, fig. 1. 



Shell small, turbiniform, very thick ; spire short, obtuse, apex 

 mammillated ; whorls about 4, the first two smooth, very rapidly 

 increasing, the remainder convex, ornamented with spiral ridges or 

 cords, the ridges costiform, rounded, regular, as wide as the interstices, 

 ornamented with blood-red spots ; spots here and there interrupted, 

 sometimes disposed in nearly regular series parallel with the axis, 

 more obscure on the posterior part of the last whorl ; interstices 

 between the ridges profound, sulciform, white ; last whorl more 

 produced than the spire, quite inflated, rounded at the periphery, 

 depressed on the base, umbilicated ; umbilicus very narrow, white, 

 encircled by a white zone ; aperture oblique, rounded, simple ; peris- 

 tome with a light thickening; witliin white, or painted like the out- 

 side ; suture somewhat impressed, simple. 



Alt. 3, diam. 3 mill. (Caramagna.) 



Assab. 



G. tapparonei Caramag. Bull. Soc. Mai. Ital. 1888, p. 129, t. 8, 

 f. 5. 



G. ISSELII Caramagna. PI. 51, figs. 5, 6. 



Shell conoidal, solid, umbilicated ; whorls 5, angular, separated by 

 somewhat deep sutures, canaliculate, granulate, maculate with 

 olivaceous, minutely obliquely striate ; obscure subquadraugular 

 spots alternating with white ones on the last whorl; 3d and 4th 

 whorls angular above and below, with 4 cinguli ; low'er part of last 

 whorl with 17 cinguli ; outer lip acute, slightly sulcate at margin, 

 maculate ; columella denticulate in the middle ; aperture suboval, 

 canaliculate within, whitish pearly ; umbilicus narrow, deep, ob- 

 liquely channelled. Alt. 7, diam. 7 mill. (Caramagna.) 



Assab. 



G. isselii Caramag., Bull. Soc. Mai. Ital., 1888, p. 129, t. 8, f. 6. 



