BY C. IIEDLEY. 183 



COXIELLA BADGERENSIS, JolinstOll. 



The genus Coxlella was founded by Smith* on Truncatella 

 striatula, Menke, a native of West Australia. In Dr. Cox's 

 * Monograph of Australian Land Shells,' two species of this genus 

 were distinguished, but the striatula of Menke was redescribed 

 as a new species, Blanfordia pijrrhostoma, while Menke's name 

 was attached to the eastern species. This reversal of nomen- 

 clature confused Smith, who, in establishing his genus, recognised 

 but one species. 



Later I invitedf Mr. Smith to reconsider his decision. He 

 accordingly re-examined the subjectt and separated, as suggested, 

 three species, the western C. striatula, Menke, the central C. 

 gilesi, Angas, and the eastern form for which he coined a new 

 name, C. confusa, Smith. 



It unfortunately escaped his notice that a name for the 

 eastern species already existed, viz., Potamiopsis badgerensis, 

 described as fossil from Badger Island, Bass Straits, by R. M. 

 Johnston. § This name its author was afterwards inclined to 

 discard! I as superfluous. Tate & May recognised! Johnston's fossil 

 as identical with C. confusa, Smith. I have also the assurance 

 of Mr. W. F. Petterd, who is better acquainted with the species 

 than myself, that C. hadyerensis cannot be specifically distin- 

 guished from the recent shell. It follows, therefore, that the 

 earlier name of Johnston must replace the doubly appropriate 

 Coxiella confusa, Smith. 



Heterocyclus petterdi, Smith. 



(Plate viii., fig. 7.) 



The accompanying figure is drawn from one of the original 

 specimens of Bythinia richmondiana, Petterd,*'^' which the author 



* Proc. Mai. Soc. i. 1894, p. 98. 



t P'roc. Mai. Soc. i. 1895, p. 260. 



::: Proc. Mai. Soc. iii. 1898, p. 7H. 



§ Proc. Roy. Soc. Tas. 1878, p. 26. 



II Geol. Tas. 1888, p. 329. 



% These Proceedings, xxvi. p. 449. 



** Journ. of Conch, iv. 1884, p. lo9. 



