74 



A. huccmoides. The granulations on the callus, the manner in 

 which a portion of the latter is spread over the whorls of the 

 spire from the columellar border nearly to the protoconch, and 

 the relatively smaller size of the twisted anterior of the columella, 

 are also distinctive features. 



Dimensions. — Length 46 mm. ; breadth 20 mm. ; length of 

 aperture 26 '5 mm. 



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



G. 4197. Two adult specimens. Presented hj John Dennant, Esq. 



G. 5507. Two younger examples. Purchased. 



G. 9331. A series exhibiting stages of growth. Purchased. 



Ancilla semilsevis, Tenison-Woods (sp.). 



1879. AncUlaria semilievis, T. "Woods, Proc. Linn. Soc. N.S.W. vol. iii. 



p. 229, pi. XX. fig. 7. 

 1889. AncUlaria semilcevis, Tate, Trans. Eoy. Soc. South Aust. vol. xi. p. 148. 

 1893. AncUlaria semilcevis, Tate and Dennant, id. vol. xvii. pt. 1, p. 220. 



This shell has an acuminate spire, the callus is not strongly 

 developed, and the sutures are bordered by a slight angulation 

 producing a spiral ridge on the surface. The smooth zone is rather 

 narrow, and the spiral band and denticle are well pronounced. It 

 presents some analogy with A . arenaria, Cossmann, from the Eocene 

 of the Paris basin ; the latter, however, is a smaller species, whilst 

 the aperture of the shell is not so large relatively, and its columella 

 is not excavated so deeply. 



Dimensions. — Length 18 mm.; breadth 7"5 mm. ; length of 

 aperture 9 mm. 



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



G. 4224. Three specimens. Presented hy John Dennant, Esq. 



G. 9333. Several examples showing stages of growth. Purchased. 



Ancilla lanceolata, Tate (sp.). 



1889. AncUlaria lanceolata, Tate, Trans. Eoy. Soc. South Aust. vol. xi. 

 p. 147, pi. vii. fig. 2. 



The callus of this species presents some analogy with that of 

 A. hehera, but the spire is contracted slightly at the apex; the 

 shell is not so cylindrical, and is much more elongated. None of 

 the specimens in the Museum exhibit the denticle ; its existence, 



