VAGTNELLA. 21 



Cleodora siihcla, this species is distinguished by its elliptical 

 aperture, proportionately greater breadth, and by its abruptly 

 tapering apex. 



Dimensions. — Length 5 mm.; diameter of aperture about Imiu. 



Form, and Loc. — Eocene : Muddy Creek, Victoria. 



G. 9306. Three specimens. Purchased. 



Genus VAGINELLA, Daudin. 



[Bull, des Sciences (Soc. Philom.) Paris, t. ii. No. 43, 1800, p. 145, 

 pi. xi. fig. I.] 



Shell long, ventricose, depressed ; apex sharp-pointed, con- 

 stricted in front ; aperture slightly canaliculated and compressed 

 laterally. 



The occurrence of this genus in Australia is very remarkable, 

 the more so that it is found in beds of Eocene age, whereas in 

 Europe it is characteristic of the Upper Tertiaries, especially tlie 

 Langhian division of the Miocene. 



Type. — Vaginella depressa, Daudin. 



Vaginella eligmostoma, Tate. 



1887. Vaginella eligmostoma, Tate, Trans. Roy. Soc. South Aust. vol. ix. 



p. 195, pi. xs. fig. 7. 

 1889. Vaginella eligmostoma, Dennant, id. vol. xi. p. 48. 

 1893. Vaginella eligmostoma, Tate and Dennant, id. vol. xvii. p. 223. 



This species, which is very common in beds near the base of 

 the section at Muddy Creek, has been aptly compared by Professor 

 Tate to V. depressa, Basterot. The present writer, who has found 

 large numbers of the latter species at Moulin de Lagus, the 

 Coquilliere at Leognan, and other localities near Saucats, south 

 of Bordeaux, is enabled to state from comparison of abundant 

 material of both the Australian and European species mentioned, 

 that V. eligmostoma is narrower, longer, more depressed in pro- 

 portion to its size, and more prominently constricted beneath the 

 expansions of the aperture. The representation of V. depressa as 

 having simple margins meeting at an angle on either side of the 

 aperture is not borne out by the facts, though the margins are 

 not sinuated to the same extent as in the Australian species. The 



