Art V. — Coiitribation>i to the Pidaoutoloyy of the Older 

 Tertiary of VictoritL 



Gastropoda. — Paki- I. 



Bv G. B. PRITCHARD, 



Lecturer on Geology, etc., Working Men's College, Melbourne. 



(With Plates VII. and VIII.). 



[Read 9th June, 1898]. 



Ill the course of my examination of some of our Older Tertiary 

 shells, I have frequently been met with many difficulties on 

 account of the confusion surrounding some of our described 

 species. It is therefore my intention from time to time to 

 include in these contributions the results of ray study upon 

 described species, as well as to include full descriptions of 

 undescribed material. When possible, the new species will be 

 figured, but, failing the issue of plates with the letterpress, I 

 hope the descriptions will be found to serve as a sufficient guide 

 for the recognition of the species. 



Lotopium ppatti, T. Woods. 



The first species I wish to remark upon is that described by 

 the Rev. J. E. T. Woods under the name of Triton prattii. His 

 original description of this species was given in Latin in the 

 Proceedings of the Linnean Society of New South Wales for 

 the year 1878, in a paper "On Some Tertiary Fossils from 

 Muddy Creek, Western Victoria," and may be interpreted as 

 follows: — Shell small, tumidly fusiform, turreted, solid, shining; 

 whorls seven (including two embryonic), convex, girt with 

 unequal spiral line, costal obsolete, somewhat wrinkled, and 

 everywhere closely striate, striaj minute longitudinally arranged ; 

 varices convex, broad, elevated ; apex obtuse, nucleus smooth, 

 rapidly increasing, conspicuous ; aperture elliptical, dentate 

 within, peristome produced, sharp conspicuous lip ; canal pro- 

 longed, narrow and recurved. 



