FASCIOLAEIA. 141 



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



G. 4253. An example of the senile stage, callous at the posterior 

 extremity of tlie columellar border. 



Presented hij John Dennant, Esq. 



G. 5526. An example of the adult stage with thick outer 

 margin, and coarse granose lirse within. Purchased. 



Fasciolaria decipiens, Tate. 



1S88. Fasciolaria decipiens, Tate, Trans. Eoy. Soc. South Aust. vol. x. 



p. 1.50, pi. viii. fig. 1. 

 1893. Fasciolaria dtcipiens, Tate and Dennant, id. vol. xvii. pt. 1, p. 219. 



The spire of this shell is more elevated than in F. cnjptoploca, 

 it is more tapering and narrower ; the ornament on the whorls 

 is of the same general character ; the aperture is narrower and 

 drawn out ; the columellar border is often detached, and carries 

 two small plaits in front. In the adult the columellar plications 

 are barely perceptible, being situated well within the aperture, 

 so that the shell is somewhat like Aptijxis, Troschel, with which 

 subgenus it is unquestionably closely allied. The passage from 

 Fusns to Fasciolaria may be readily understood from a consideration 

 of this species. 



F. decipiens bears considerable external resemblance to Fasus 

 vigrirostrafus, E. A. Smith, living in the seas of Japan, south of 

 Corea; but the latter species, though having a twisted columella, 

 posses.scs no plaits, and is a true Aptyxis. 



Dimensions. — Length 48 mm.; breadth 19 mm.; length of 

 aperture 16 mm.; length of canal 11mm. 



Form, and Loc. — Eocene : Victoria and South Australia. 



G. 4252. E.xamples of the adult ; from Muddy Creek. 



Presented hij John Dennant, Esq. 

 G. 4285. A specimen of the ncanic stage ; from Muddy Creek. 



Presented hy John Dennant, Esq. 

 G. 5523. A very elongate form ; from Muddy Creek. Purchased. 



G. 9440. An example showing extreme variation ; the longi- 

 tudinal costoc are subnodose at the periphery, and the shell 

 is broader thau in typical specimens; from Kiver Murray cliffs. 



Purcliased. 



