GIBBULA. 205 



T. varius Linn., Syst. Nat. xii, p. 8568. — Fischer, Coq. Viv., p. 

 259, t. 87, f. 2.— Philippi, Conchi/L Cab., p. 191, t. 29, f. 8, 13.— 

 Hanley, Ipsa Linn. Conch., p. 318. — BuQ., Dautz. et Dollfus, 

 3foll. du Rouss., p. 385, t. 46, f. 6-14. — T. roissyi, Payr., Moll, de 

 Corse, t. 6, f. 18, 14. — T. pallidus Forbes, Rep. J^g. Inv., p. 138. — 

 T. elata Brusina, Conch. Dahn. Ined., p. '-'6. — T. gibbosula Brus. 

 Contr. Fauna Dalmatia, p. 80. 



This form connects the preceding with the following group of 

 species. It is less acuminate in the spire than G. umbilicaris, more 

 finely spirally striate, and with much more oblique aperture and ex- 

 panded umbilicus ; from G. richardi the flatter whorls and spiral 

 strife separate it. The periphery is sometimes rounded. 



G. PHiLBERTi Recluz. PI. 31, figs. 25, 26, 27. 



Shell small, umbilicate, conical, thin ; coloration very variable, 

 sometimes uniform dark brown or red, sometimes cinereous, longi- 

 tudinally clouded with brown, or with spiral series of blackish dots ; 

 spire low-conic, gradate ; sutures impressed ; whorls 6, a little gib- 

 bous just below the sutures, causing the spire to be somewhat 

 turrited ; whorls encii*cled by numerous fine unequal lirulse or strijfi ; 

 periphery obtusely angular; base convex, generally a little more 

 coarsely Urate than the upper surface; aperture subquadrangular, 

 oblique, not angled ao the junction of basal lip and columella ; col- 

 umella perceptibly arcuate ; umi)ilicus large, funnel-shaped, w'hite, 

 margined by one or several spiral riblets. 



Alt. 6-11, diam, 8-12, mill. 



Mediterranean Sea. 



T. philberti Recluz. Rev. Zoologique, 1343, p. 11. — Monterosato, 

 Conch, litt. Medit., p. 8. — BuQ., Dautz. et Dollfus, Moll. Mar. du 

 Rouss., p. 383, t. 46, f. 1-5. — T. villicus Philippi, Enum. Moll. 

 Sicil., ii, p. 152, t. 25, f. 14 and Conchijl. Cab., p. 194, t. 29, f. 17.— 

 Fischer, Coq. Viv., p. 258, t. 87, f. 1. 



A smaller species than the preceding, quite stable as to form, but 

 exhibiting great variation in the development of the spiral riblets. 

 Sometimes all are small, nearly equal, and sometimes several larger 

 ones are developed upon the upper surface. 



G. LEucoPHiEA Philippi. PI. 31, figs. 29, 30. 



Shell elevated-conical, slightly obtuse, umbilicata, spirally striate, 

 ashen, spotted and marbled with white, brown and black dots ; 

 whorls contiguous, flat, smooth, the last angulated ; aperture sub- 



