GIEBULA. 201 



G. pulcherrima A. AD. P. Z. S. 1854, p. 39. Forskdlia pulcher- 

 rima H. & A. AD., Genera, i, p. 432. Trockus (Forskdhlia) pul- 

 cherrimus E. A. SMITH, P. Z. S. 1878, p. 818, t. 50, f. 22, 22a. 



I am not at all sure that this beautiful shell is a Forskdlia. It is 

 quite variable in color. A specimen before me has no subsutural 

 red blotches, but has a girdle of square spots below the periphery. 

 Smith (loc. cit.) says : " The oblique arcuate phik or scarlet stripes 

 on the upper part of the body-whorl, which in some specimens are 

 black, generally terminate a little above the middle. At this part 

 the whorl is encircled by two close-set gran u Ions lira?, with a furrow 

 on each side, whereof the lower is the most conspicuous. Immedi- 

 ately below this the color of the interrupted scarlet stripes changes to 

 black and they assume the form of somewhat quadrate spots, but 

 toward the aperture become more flame-like and merge into scarlet." 



G. ALBIDUM Grnelin. PL 63, figs. 12, 13, 14. 



Shell conical, umbilicate or irnperforate, solid, whitish, painted 

 with longitudinal stripes of red, brown or purple, the base striped, 

 maculated or mottled ; spire acute ; whorls 7, tumid below the 

 sutures and sometimes obsoletely plicate there, spirally lirate, the 

 last tumid at the periphery, convex beneath ; columella slightly 

 sinuous and prominent in the middle ; umbilicus white, funnel- 

 shaped when open, frequently closed. Alt. 21, diam. 23 mill. 



Sicily; Dalmatia; Italy; Greece. 



Trochus cinerarim BORX, Test. Mm. Cut*., p. 330, t. 11, f. 19, 20 

 (not T. cin.erarius Linn.). T. albidus GMEL., Syst. Nat., xiii, p- 

 3576. T. biasoletti PIIILIPPI, Enum. Moll. SiciL, i, p. 178, t. 10, f- 

 IS. Conchyl. Cab., p. 187, t. 29, f. 1. FISCHER, Coq. Viv., p. 204, 

 t. 68, f. 2. T. magulus DESH., Exped. Morce., p. 144, t. 1*. f. 26, 

 27. T. borni CANTRAINE, Mai. Medit., t. (>, f. 17. / T. saulcyi 

 D'ORBIGXY, Hist. Nat. Canaries, p. 83, t. 6, f. 24-26. (1844.) 



This species is a miniature G. magus, without the subsutural 

 tubercles of that species, and with narrower or closed umbilicus. 



I quote with some hesitation the T. saulcyi of d'Orb., in the 

 synonymy of this species, following Dr. Fischer. The figures of T. 

 saulcyi cited above are copied on my plate 24, figs. 97-99. I 

 am strongly inclined to consider T. saulcyi a form of Monodonta 

 sauciata Koch. Bern's figures, referred to by Gmelin, undoubtedly 

 represent this species. 



