GIBBULA. 211 



Bull. Sci. Nat.' Moscou, 1837, p. 60. T. variegatus Risso, teste 

 Monterosato. T. olivaceus ANTON, Verzeich., p. 57. T. pumilio 

 PHIL. Enum. Moll. Sicil., ii, p. 226, t. 28, f. 7 ; Coiichyl. Cab., p. 94, 

 t. 15, f. 19. 



A variable species, distinguished from the preceding by its more 

 elevated form and thinner shell. From G. tnmida Montagu the 

 more acute spire will separate the present species ; and also the 

 shape of the whorls, which are less tumid and angulated below the 

 sutures. The form and coloration are very mutable and also the 

 sculpture varies, sometimes being quite coarse. T. pumilio Phil, 

 may belong in Calliostoma. It is figured on pi. 40, fig. 35. 



Var. ADRFATK-A Philippi. PI. 30, fig. 1. 



Shell more solid, generally paler, the base whitish ; spiral sculpt- 

 ure stronger, the penultimate whorl with about 5 well-marked, 

 separated spiral lira?; body-whorl angulate at the periphery. 



Var. TURBINOIDES Deshayes. PI. 33, figs. 94, 95. 



Shell smaller than G. adansoni, globose, rose-red, yellowish, or 

 brown, with short white fiammules below the sutures, the remainder 

 of the shell minutely punctate with white. Alt. 8, diam. 8 mill. 



G. DREPANENSIS Brugnone. PL 33, figs. 100, 101. 



Shell small, narrowly umbilicate, depressed, stomatella-sh&ped, 

 whitish, zigzagly striped with red, the stripes often broken into 

 spots, white around the umbilicus; spire very short; sutures im- 

 pressed ; whorls 32 to 4, convex, rapidly widening, encircled by 

 spiral striae which are nearly obliterated on the last whorl ; body- 

 whorl very large, depressed ; aperture large, oblique, subcircular ; 

 columella arcuate. Alt. 3-4, diam. 4-5 mill. 



Provence; Sicily; Sardinia; Algiers. 



Trochus drepanensis BRUGNONE, Miscellanea malacologica, pt. 1, 

 p. 13 (1873). MONTEROSATO, Journ. de Conch., xxv, p. 31, t. 2, f. 

 6 (1877). BUQ. DAUTZ. ET DOLLFUS, Moll, du Rouss., p. 398, t. 

 50, f. 25, 26. 



This smallest of the Mediterranean species of Gibbula, is very 

 distinct in its minute size, obsoletely striate whorls and stomatella- 

 like form. 



Monterosato has described a G. VIMONTIJE (II Nat. Sicil., iii, p. 

 108) which I take to be a form of drepanensis. His description 



