76 



Dimensions. — Length 1 7 mm. ; breadth nearly 6 mm. ; length of 

 aperture 8 mm. 



Form, and Log. — Eocene: Aldinga, South Australia. 



G. 9325. A series exhibiting stages of growth. Purchased. 



Ancilla hebera, Hutton (sp.). 



1873. Ancillaria hebera, Hutton, Cat. Tert. Moll. N.Z. p. 6. 



1880. Ancillaria mucronata, Johnston, Geol. Tasmania, pi. xxxi. fig. 12 



{non Sowerby). 

 1889. Ancillaria hebera, Tate, Trans. Roy. Soc. South Aust. vol. xi. p. 147, 



pi. vii. fig. 5. 



Although differing in several important particulars, this species 

 is not unlike A. papillata. It lacks the solidity of the latter, 

 however, whilst the spire is not sculptured in the same manner, 

 the shell is not so cylindrical in shape, and the aperture is wider 

 and proportionately larger. Professor Tate compares it with 

 A. olivula, Lamarck, of the Paris basin, which it closely resembles, 

 though, as he remarks, the callosity is larger, more gibbous and 

 granulated in the Australasian fossil. The twisted anterior portion 

 of the columella is relatively much smaller than in the European 

 form. 



Dimensions. — Length 38 mm. ; breadth 13"5 mm. ; length of 

 aperture 22 mm. 



Form, and Loc. — Eocene : Tasmania and Victoria. 



83979. A tumid example, from Table Cape. Purchased, 



G. 4198. An elongate form, from Muddy Creek. 



Presented hy John Dennant, Esq. 



G. 9376. Several examples, showing stages of growth ; from 



Piver Murray cliffs. Purchased. 



Ancilla australis, G. P. Sby. (sp.). 



1830. Ancillaria australis, G. B. Sowerby, Spec. Concliyl. p. 7, figs. 44-6. 

 1834. Ancillaria albisulcata, Quoy and Gaimard, Voy. de I'Astrolabe, Zool. 



t. iii. p. 19, pi. xlix. figs. .5-12 [non Sowerby). 

 1834. Ancillaria australis, Quoy and Gaimard, id. p. 20, pi. xlix. figs. 13-17. 

 1844. Ancillaria australis, Deshayes, in Lamarck, Hist. Nat. Anim. sans 



Vert. ed. 2, t. x. p. 592. 



