212 GIBBULA. 



(translated) is as follows: More depressed; whorls subangulate; 

 smooth instead of striate ; of a greenish color, with metallic reflec- 

 tions. 



Provence; Algiers; Italy. 



G. TUMIDA Montagu. PI. 32, figs. 49-52. 



Shell small, narrowly umbilicare, conical, elevated; color whitish, 

 variously strigate or maculated with brown, beneath white, uni- 

 colored or punctate with brown ; spire elevated, somewhat turrited, 

 apex acute; sutures impressed; whorls 6, convex, encircled by 

 numerous, close fine striae ; periphery obtusely angular ; base slightly 

 convex, concentrically finely lirate, the sculpture coarser than upon 

 the upper surface ; aperture large, rounded-quadrate ; columella 

 oblique, straightened and a little convex in the middle ; umbilicus 

 deep, narrow, expanding and funnel-shaped at its opening. 



Alt. 8-12, diani. 7-12 mill. 



English and Northern European Coasts ; rare in the Mediterranean. 



T. tumidus MONT., Test. Brit., p. 280, t. 10, f. 4. (1803.) PHIL- 

 IPPI, Conchyl. Cab., p. 195, t. 29, f. 20-25. FORBES AND HANLEY, 

 Hist. Brit. Moll., ii, p. 153, t. 65, f. 8, 9. JEFFREYS, Brit, Conch., 

 iii, p. 307, t. 62, f. 2. FISCHER, Cog. Viv., p. 345, t. 108, f. 1, 2, 3. 

 BUQ., DAUTZ. ET DOLLFUS, Moll, du Rouss., p. 387, t. 47, f. 14-18. 

 T. Racketti PAYR., Moll, de Corse, p. 128, t. 6, f. 9, 10. BUQ., 

 DAUTZ. ET DOLLFUS, Moll, du Row*., p. 388, t. 47, f. 19-25. T. 

 tumidus var., FISCHER, Coq. Viv., p. 315. ? Gibbula pygmcea Rrsso, 

 Eur. merid., iv, p. 137. MONTEROSATO, Conch, litt. medit., p. 9, 

 Gibbula gibbosula (DAN. ET SANDRI) BRUSINA, Conch. Dalm. ined., 

 p. 27. T.petholatus DILLWYN, Catal., p. 776 (Texte Philippi). 



This turbinate little species is readily recognized by the form, the 

 whorls being a little tumid just below the sutures, and the base 

 of the aperture is usually a little emargiuate. 



VAR. RACKETTI Payrandeau. PI. 33, figs. 96, 97. 



This form differs from typical G. tumida in the constant smaller 

 size, fewer whorls (4 to 5), and generally more solid and deeply 

 colored shell. Alt. 6J, diam. 6 mill. 



Mediterranean and Adriatic Seas. 



This little Mediterranean variety is variable in proportions, 

 frequently as broad or broader than long. 



