TORNATELLID^. 35*7 



Shell turbinate, more or less involute, last whorl usually higher 

 than the spire, with a flattened narrow solid edge along the 

 suture; aperture semieffuse, anteriorly rounded, inner lip thick- 

 ened, especially in front, and provided with three oblique folds. 



Globiconcha, d'Orb. 



Distr. — 6 sp. Cretaceous ; France. G. conifor-mis, Romer 

 (Ixxxviii, 52). G. Fleuriausa, d'Orb. (Ixxxviii, 53). 



Shell globular-conic, spire short, or involute ; aperture narrow, 

 crescent-shaped ; margin acute ; columella not thickened or 

 plaited. 



Tylostoma, Sharpe, 1849. 



Etym. — Tidos^ a callosity, stoma, mouth. 



Distr. — 4 sp. L. Cretaceous rocks ; Portugal. T. torrubiae, 

 Sharpe (Ixxxviii, 54). 



Shell ventricose, smooth or punctate-striate, spire moderate, 

 aperture ovate-lunate, pointed above, rounded in front ; outer 

 lip periodically (once or twice in a whorl) thickened inside and 

 expanded, rising slightl}^; inner lip callous, spread over body- 

 whorl. 



Stoliczka refers this genus to Naticidse ; its true affinities are 

 difficult to ascertain. 



VARiGERA, d'Orb. Shell with lateral varices. T. JRochatiana, 

 d'Orb. (Ixxxviii, 55). Cret. ; France. 



Subfamily BINGIGULINM. 



The shells resemble Actseon except that they have the margins 

 of the aperture strongly thickened and externally varicose, the 

 canal is twisted or plaited, and always terminates anteriorly with 

 a distinct fold, in front of which there is a groove or kind of 

 canal in the thickened margin. The other genera proposed may 

 well be considered subgenera of Ringicula. 



RiNGicuLA, Desh. 



Etym. — Diminutive of ringens, from ringo, to grin. 



Syn. — Aptycha, Meek. 



Distr. — 75 sp., the recent ones in all warm seas. Fossil. 

 Miocene — . B. buccinea, Desh. (Ixxxvii, 29). 



Shell minute, ventricose, with a small spire ; aperture notched, 

 columella callous, deeply plaited ; outer lip thickened and 

 reflected. 



RiNGiNELLA, d'Orb. ■ Shell oval, with revolving punctate striae ; 

 aperture entire, without channel ; outer lip strongly thickened ; 

 inner lip thickened, with anterior plications. Several cretaceous 

 species. E. Clementina, d'Orb. (Ixxxviii, 57). 



ERiPTYCHA, Meek. (Euptycha, Meek, preoccupied). Shell 

 globose, aperture very narrow;, one strong, often bifid anterior 



