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CONTRIBUTION TO AUSTRALIAN ICHTHYOLOGY. 

 By J. Douglas Ogilby. 



In the paper here submitted to the Society descriptions of the 

 following new genera and species of Australian fishes are given: — 

 (Plotosid^) Euristhmus, g.n., and Ostophycephalus duriceps, g. 

 and sp.nn.; (Galaxiid.e) Galaxias occidentalis, sp.n.; (Ser- 

 RAXiDiE) Bostockia (g. redescr. ) hemigramvia, sp.n.; Einneplielides 

 leai, g. and sp.nn.; (Theraponid^) Therajyon kumeralis, sp.n.; 

 and (Cepolid^e) Cepola australis, sp.n. The following species, 

 which have been insufficiently diagnosed, are also redescribed : — 

 (MoNOCENTRiD^) MonocentHs gloria-maris; (Cheilodipterid^) 

 Apogon riippellii ; (Serranid^e) Edelia vittata ; and (ScARiDiE) 

 Pseudoscarus gymiiognaihos. Notes on Ccdlanthias platei are 

 also given; and the suggestion is here thrown out that Callan- 

 thias (type — peloritamis), Anogramma (type — aUporti), and Gram- 

 tna (type — lorelo) should be set apart as a subfamily {Gallan- 

 thiince) of the Serranid.e. The families MoNOCENTRiDiE and 

 CepoliDjE are also diagnosed in this paper. 



Most of the new species are from West Australia, and were 

 kindly collected and given to me by Mr. Lea, now Government 

 Entomologist of Tasmania, but at that time holding a similar 

 position to the West Australian Government, 



Two important species were obtained in Port Jackson, and in 

 this case the honour of adding two new families to the Australian 

 fauna is due to Mr. Brodie, who has kindly submitted to me for 

 identification Gonorhynchus greyi and Cepola austrcdis, 



PLOTOSID^. 

 Euristhmus, gen.nov. 



Body elongate; tail more than twice as long as the head and 

 trunk. Skin smooth. Head tetragonal, much wider than deep, 



