GIBBULA. 211 



Bull. Sci. Nat. Moscoii, 1837, p. 60. — T. voriegatus Rrsso, teste 

 Monterosato. — T. oUvaceus Axton, Verzeich., p. 57. — T. jnimillo 

 Phil. Enimi. Moll. 8icil., ii, p. 226. t. 28, f. 7 ; Coiicliyl. Cab., p. 94, 

 t. 15, f. 19. 



A variable species, distinguished from the preceding by its more 

 elevated form and thinner sliell. From G. tumida 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 coai-se. T. pumilio Phil, 

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



Var. ADRiATiCA 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 lirse; body-whorl angulate at the periphery. 



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



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

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

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



G. DREPANENSis Brugnone. PI. 33, figs. 100, 101. 



Shell small, narrowly umbilicate, depressed, stomatella-shaiied, 

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

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

 pressed; whorls 3j to 4, convex, rapidly widening, encircled by 

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

 whorl ver}' large, depressed ; aperture large, oblique, subcircular ; 

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



Provence; Sicily; Sardinia; Algiers. 



Trochiis drepanensis Brugnone, Miscellanea malacologica, pt. 1, 

 p. 13 (1873). — Monterosato, Jotirn. 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. vimonti^ (II Nat. Sicil., iii, p. 

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



