204 GIBBULA. 



Var. LATIOR Monts. PI. 33, fig. 89. 



Large, thin, much depressed, the sutures profound ; body-whorl 

 depressed, carinated, finely lirate ; aperture large, oblique, expanded ; 

 umbilicus broad, funnel-shaped. Alt. 9, diam. 15 mill. 



Gulf of Gabes, Tunis. 



I have also a conical form from Greece, nearly smooth. 



Alt. 10, diam. 11 mill. 



G. NEBULOSA Philippi. PL 63, figs. 15, 16. 



Shell conoidal, umbilicate, solid, reddish, spotted with white ; 

 whorls slightly convex, grooved by 6 superficial sulci, the last 

 rounded-angular ; base grooved with 4 stria? ; umbilicus patulous, 

 smooth, white ; aperture suborbicular. (Phil.) 



This species approaches near to T. umbilicaris L. in the structure 

 of the umbilicus and the sculpture, but it differs in the smaller size, 

 much more elevated whorls, the last less angular. The sculpture of 

 the upper surface consists of 6 to 7 impressed spiral lines (not of 

 elevated line), whicn become evanescent below the periphery, the 

 base showing about 4. The color is reddish, with white spots, 

 especially above and beneath the suture ; the conic apex is blackish. 



Alt. 10, diam. 10-f mill. 



Mediterranean at Alexandria; Red Sea. 



T. nebulosus PHIL. Zeitschr. f. Mai. 1848, p. 109 ; Conchyl. Cab. p. 

 232, t. 35, f. 5. 



Probably a synonym of G. umbilicaris. 



* * * 



(Phorcus.) 

 G. VARIA Linne. PI. 33, figs. 77, 80, 81. 



Shell urabilicate, conical, solid, dull, lusterless yellowish white or 

 pinkish, with flexuous radiating cinereous or violaceous stripes 

 below the suture, the entire surface finely mottled and dotted with 

 yellowish or violaceous and white ; spire conical, short, not 

 acuminate as in G. ardens and umbilicaris ; whorls about 6, flat- 

 tened, separated by slightly impressed sutures, encircled by numer- 

 ous fine stride ; body-whorl obtusely angular at the periphery ; 

 aperture large, very oblique, smooth within ; columella oblique, 

 straightened ; umbilicus funnel-shaped, whitish within. 



Alt. 12, diam. 15 mill. 



Mediterranean Sea. 



