298 STUDIBS ON AUSTRALIAN MOLLUSCA, xi., 



Ranella argus Hutton, These Proceedings, ix., 1885, p.933; Id., 

 Verco, Trans. Roy. Soc. S.A., xix., 1895, p.104. 



Lotorium argus Pritchard and Gatliff, Proc. Roy. Soc. Victoria, 

 x., 1898, p.267. 



Under the names of Ranella argus and R. vexillum, this 

 species has been identified by Menke from West Australia, by 

 Verco from South Australia, by Pritchard and Gatliff from Vic- 

 toria, by Tenison-Woods from Tasmania, and by Hutton from 

 New Zealand. According to the British Museum Collection, A. 

 argus is a distinct species from South Africa. While A. vexillum, 

 which is more nearly related to A. tumidum than to A. argus, is 

 from South America. In London, there are three specimens, 

 types of A. tumidum Dunker, labelled " Nova Seelandia." This 

 appears to me the correct name of the species, extending from 

 New Zealand to Tasmania and Australia. Tryon presented a 

 whole austral group of argus, vexillum, tumidum, proditor, etc., 

 as a single species. The earliest name for the South American 

 form is not Ranella vexillum Sowerby, 1835, but Triton ranelli- 

 f or mis King, 1831. 



Natica gualteriana Recluz. 



Natica gualteriana Recluz, Proc. Zool. Soc, 1843(1844), p. 208; 

 Id., Journ. de Conch., i., 1850, p.396; Id., Philippi, Conch. Cab. 

 ii.,(l) 1852, p.71, PL xi., f.8; Id., Reeve, Conch. Icon., ix., 1855, 

 PL xxv., fig. 11 4. 



Natica marochiensis Angas, Proc. Zool. Soc, 1867, p. 19 7, and 

 1877, p.236; Id., Brazier, These Proceedings, i., 1877, p.23G; Id., 

 Shirley, Proc. Roy. Soc. Queensland, xxiii., 1911, p. 98. 



In the British Museum, at least two species are exhibited as 

 " maroccana Chemnitz," or " maroccana var." There is a tablet 

 with five specimens labelled " maroccana, Chemnitz, Cape York, 

 N. Australia, J. B. Jukes, Natica marochiensis, Lamk. Voy. Ast. 

 t.66, f.16." This has a low spire, radial furrows on the shoulder, 

 and the operculum of Cochlis, i.e., with a single marginal sulcus. 

 Again, there are three specimens from Senegal, and three from 

 the River Gambia, (the latter alternatively marked " Gambiae, 

 Reeve ") which, though called by the same name as the Cape 



