350 CENSUS OF THE MARINE MOLLUSCA OF TASMANIA, 



Another source of error is the accidental introduction of exotic 

 species by traders to the Islands of the Flinders Group. Of the 

 eleven species received by the Rev. Tenison- Woods from Mr. 

 Ronald Gunn, five of them attributed to the North Coast are 

 represented by unicums and have not been rediscovered ; we 

 consider them to have been introduced. 



The issue to us (August 1st, 1900), at the last moment of resign- 

 ing this manuscript to the Society, of a paper entitled " A List 

 of Tasmanian Shells in the Tasmanian Museum Collection, with 

 the names of many Species that are not yet represented therein, 

 by M. Lodder " (Proc. R. Soc. Tasmania, issued June, 1900), 

 comes rather late to permit of an exact revision of the claims of 

 some species to inclusion in the Tasmanian list ; certainly the 

 majority of these are included on very uncertain evidence as 

 regards their Tasmanian occurrence. Doubtlessly, many of the 

 Victorian species may yet be found on the northern coast, which 

 has not been so thoroughly explored as other parts. 



The species quoted by Miss Lodder as forming part of the 

 collection in the Hobart Museum have been re-examined, with 

 the result that our interpretations remain unaltered. 



Messrs. Petterd and May have intimated that they will donate 

 their types to the Hobart Museum. 



iii. — Systematic List of Species. 



Class CEPHALOPODA. 



Family ARGONAUTID.E. 



Genus Argonaut a, Linne, 1 756. 



*A nodosa, Solander, 1786; Sowerby, Thes. Conch., t. 257, f.3. 

 Census; Aust. Mus., Sydney; East and South Coasts, W.L.May. 



Family OCTOPODID.^. 

 Genus Octopus, Lamarck, 1799. 



0. pictus, Brock, 1882; Hoyle, Challenger ZooL, xvi., 1886. 

 Tasmania (Aust. Mus., teste J. Brazier). 



