94 Proceedings of the Royal Society of Victoria. 



doubt but that the most satisfactory treatment is to regard all 

 the forms indicated above as variations of but one species. 

 Although this will no doubt be somewhat perplexing to the 

 young collector at first, he will eventually see the necessity for 

 such treatment as he completes his series. As a rule it is very 

 easy to pick out the form R. nana as a good variety, although 

 the same cannot always be said of the forms under the names of 

 R. aurata and R. plana. 



Genus Fossarina, Adams and Angas, 1863. 



FOSSARINA PETTERDI, CrOSSe. 



1870. Fossarina petterdi, Crosse. Jour, de Conch., p. 



303. 



1871. Fossarina petterdi, Crosse. Id., p. 323, pi. 12, f. 1. 

 1876. Fossarina simsoni, T. Woods. P.R.S. Tas., pp. 



149, 150. 

 1881. Fossarina simsoni, T. Woods. T.R.S. Vic, vol. 



xvii., p. 81. 

 1887. Fossarina petterdi, Tryon. Man. Conch., vol. ix., 



p. 275, pi. 52, f. 20, 21. 

 1887. Fossarina simpsoni, Tryon. Id., p. 275. 

 1900. Minos petterdi, Lodder. Cat. Tas. Shells, P.R.S. 

 Tas., p. 12 (of reprint). 

 Hab.- — Port Phillip ; Sandringham ; Frankston ; Mornington ; 

 Sorrento. 



Obs. — Tryon misspells T. Woods' species as F. simpsoni, and 

 he also states that Hutton remarks that this species has the 

 dentition and operculum of the Trochidae and iiot of the 

 Littorinidae, and that it may possibly be an Adeorbis. T. 

 Woods himself in the Transactions of the Royal Society of 

 Victoria, after dealing witli the description of F. funiculata, states 

 that this shell closely resembles F. simsoni, nobis, which is 

 identical with F. petteidiana, Crosse, a prior name. 



FOSSARIXA BRAZIEHI, Angas. 



1871. Fossarina brazieri, Angas. P.Z.S. Lond., p. 18, 



pi. 1, f. 24. 

 1881. Fossarina funiculata, T. Woods. T.R.S. Vic, 



vol. xvii., p. 81. pi. , f. 6, 7. 



