70 



Cancellaria (Sveltia) epidromiformis, Tate. 



1889. Cancellaria epidromiformis, Tate, Trans. Roy. Soc. South Aust. 



vol. xi. p. 154, pi. viii. fig. 9. 

 1889. Sveltia epidromiformis, Cossmann, Ann. Geol. Univ. t. v. p. 1091. 



Shell long, thick with sub-turreted spire ; protoconch obtuse, 

 composed of one and a half turns, the earlier portion being planted 

 obliquely with reference to the axis of the shell, smooth, except 

 anteriorly, where frequent, microscopic, longitudinal lineations 

 appear ; whorls deeply excavated at the suture, where an inward- 

 sloping spiral platform occurs ; spirally and longitudinally ribbed, 

 granulated at the points of intersection, the former being the more 

 prominent ; interrupted here and there by varices ; aperture 

 relatively small, ovate ; outer border plicate within ; columella 

 imperforate, with three plications ; anterior canal truncate. 



This is a typical example of the subgenus Sveltia, except that 

 it has three columellar plications instead of two. In the young 

 these are even more marked than in the adult. 



Dimensions. — Length 20 mm.; breadth 10 mm.; length of 

 aperture 9 mm. 



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



G. 4260. An adult example. Presented hy John Bennant, Esq. 



G. 9370. Two specimens, one of which is a well-preserved 

 example of the neanic stage of growth. Furcliased. 



Family OLIVID^. 



Genus OLIVELLiA, Swainson. 



[Malacology, 1840, p. 34.] 



Olivina, D'Orbigny, Voy. Amerique Meridionale, t. v. 1841, p. 417 

 [non Morch). 



A comparison of the soft parts of Olivella and Oliva exhibits 

 many features of interest, fully sustaining the generic separation 

 of the two. The head of Oliva, for instance, is furnished with 

 slender tentacles and eyes, the median tooth of its radula is 



