102 MEJUOmS OF THE QUEENSLAND MUSEUM. 



a-. Pectoral fins not extending to the caudal (Dendrochibus). 



/'. Interorbital region broad and shallow ; genal ridge broad and densely spinulose ; supra- 

 orbital filament sliort . . . . . . . . . . . . . . 4. miles'' 



/-. Interorbital region narrow and deep; gtnal ridge narrow and feebly spinose ; supraorbital 

 filament long . . . . . . . - . . . • . . . . 5. zcbra^" 



CARACANTHID^. 



CARACANTHUS UNIPINNA (Gray)." 



The reputed seleroderm from the Banks Islands described by De Vis^- as 

 Trachyccphalus"^ ha)ikicnsis proves on examination to be identical with the above 

 fish. I am indebted for this determination to ray friend and colleague Mr. 

 Allan R. MeCulloeh, to whom 1 foi-warded three examples under the irapi-ession 

 that they were an aberrant Gohiodtin. We do not consider the trivial character 

 of the continuity of the dorsal fin sufficient justification for the removal of this 

 fish to the special genus Amphiprionichikys. 



Mr. McCidloeh kindly sends me the .synonymy of our genus and species, 

 which may lie advanlageously inserted liere : — 



Genus CARACANTHUS, Kroyer. 



Micropus Gray, Zool. Misc., 1831 , p. 20. (JM. maculatus Gray). Not JM icropiis Wolf, 1 810. 



Caracanthus Kroyer, Naturhist. Tidsskr.. i, 1844, p. 267. (('. typicus Kroyer) ; Jordiin & Ever- 

 mann, Bull. U. S. Fish. C'onun., xxiii, i, 1905, p. 453. 



Amphiprionichthys Bleeker, Nat. Tijds. Nederl. Ind., viii, 1855, p. 170 (A. iipiKtiis Bleeker). 



Centropun Kner, Sitz. .Akad. Wien, xxxix, 1860, p. 531 {('. sUiuroplioriis Kner). Not Centropus 

 llliger, 1811. 



Croasoderma Guichenot, Nouv. .\rcli. Mus. Hist. Nat., v, 1870, p. I!t4. (C. madajjascariense 

 Guichenot ). 



Trachycepli/iluM De Vis, Proc. Linn. Soe. N. S.Wales, viii, 1884, p. 455. (T. bankiennix do Vis) 

 Not Trachycfplmlua Tschudi, 1838, nee alio. 



TnichDci j)]ialiis Dc Vis proves to be synonymotis with Camcaiithu.<! Kroyer,, 

 and agi-ccs with the subgenus Awphiprioitichlliys Bleeker in having the dorsal 

 fins united. 



" Scorpcena miles J. W. Bennett, Fish. Ceylon, 1851, pi. ix : Ceylon. 



" Cuvier & Valcncionnos, Hist. Nat. Poiss., iv, 1829, p. 3(i7 : Mauritius. 



" Micropua unipinna Gray, Zool. Misc., 1831, ji. 20. 



« Proc. Linn. Soc. N. S. Wales, viii, 1884, pp. 455, 456. 



" De Vis was unfortunate in his choice of a generic name, 'Traclii/cephalua having been 

 tised thrice previously— by Tschudi in Batrachians 1838, by Swainson in Fishes 1839, and by 

 Gray in Reptiles 1845. 



