FISHES. — MCCULLOCH. 



197 



pectoral fins are much more numerous than in the smaller 

 ones. The disposition of the colour-marking is similar in 

 all, and is accurately shown in the accompanying plate, but 

 it is much better defined in some than in others. 



These specimens are very similar in all structural details 

 and proportions to two examples of P. didactylum with which 

 I have compared them, but they differ consistently in the 

 colour-marking of the inner side of the pectoral fin, Avhich 

 Bleeker has shown to be of value in the discrimination of the 

 species of PelorA In both my examples of P. didactylum the 

 fin is marked in the manner sho^vn in Bleeker's figure of that 

 species, 2 but in the " Endeavour " specimens it is as I have 

 figured it on PL Iviii. 



Locs. — Seven to ten miles north-west of Hummocky Island, 

 Queensland, 14-16 fathoms. 



Twenty-five miles south-east of Double Island Point, 

 Queensland, 33 fathoms. 



Seventeen to twenty miles south-west of Lady Elliot 

 Island, Queensland, 18 fathoms. 



Thirteen miles south-east of Cape Capricorn, Queensland, 

 13 fathoms. 



Eight miles south-\\est of Cowan Cowan Light, Moreton 

 Bay, Queensland, 9-15 fathoms. 



Family PLATYCEPHALID.^. 



Genus Platycephaltjs, Block d; Schneider. 



Platycephalus marmokatus, Stead. 



Marbled Flathead. 



(Plate Ivii., fig. 1 ; fig. 1.) 



Platycephalus marmoraius, Stead, New Fish. N.S. Wales, 

 1908, p. 9, pi. iii.-v. 



D. vm. 13 ; A. 13 ; P. 19-20 ; V. i. 5 ; C. 13 ; 1. lat. 65 

 (110). Head, from premaxiUary symphysis to end of oper- 

 cular lobe, 3.2-3.3 in the length to the hypural joint. Eye 5.7 

 to 5.8 in the head, and 18 in the snout, measured from the 

 anterior orbital margin to the premaxiUary symphysis, and a 

 little greater than the interorbital width. Interorbital ^idth 

 1.8-2.1 in the snout, Mhich is 3-3.2 in the head. Third dor-sal 

 spine 2.2-2.4, breadth before the pectorals 1.3, and depth 

 2.9-3.5 in the head. 



1. Bleeker — Nat. Verb. Holl. Maatsch. Wetensch., 3. verz. ii.. No. 3, 

 1874, p. 1. 



2. Bleeker — Loc. cit., pi. iv., fig. 1-la, and Atlas Ichth., ix., 1S78, pi. 

 ccccxiv., fig. 5. 



