156 CONTRIBUTIONS TO AUSTRALIAN ICHTHYOLOGY, 



anal; ventral rounded, with 1 1 rays, inserted behind the origin of 

 the second dorsal; pectoral with 8 soft rays; caudal rounded. 



Etymology : — 6(TTo(f)vr]s bony; KecfyaXr], head. 



Type: — Ostophycephalus dui'iceps, Ogilby. 



Distribution: — St. Vincent's Gulf, South Australia. 

 The species described by Giinther in the Challenger Reports 

 (i. Shore Fishes, p. 49) as Cnidoglanis nudiceps possibly belongs 

 to this genus. 



Ostophycephalus duriceps, sp.nov. 



B. viii. 1 D. i 5. 2D. + C. + A. 227(111 + 10+106). 



Depth of body 1 1 ('?), length of head 4y^ in the total length; 

 width of head ^ of its length, which is i of the distance between 

 the tip of the snout and the vent; upper profile of head gently 

 rounded and but little oblique. Eye with wholly adnate lid, its 

 diameter 8| in the length of the head and 3| in that of the snout, 

 which is sharply pointed, but weakly declivous at the extremity, 

 and 1 J times as long as wide; lower lip feebly plicated, the mental 

 lobe small and divided. Interorbital region slightly concave, its 

 width I of that of the mouth and 3| in the length of the head. 

 Premaxillary teeth in two small patches, consisting of three teeth 

 each; mandibular teeth in a wide, crescentic, divided band, each 

 half of which is twice as long as broad; a pair of enlarged conical 

 teeth on each side of the symphysis; vomerine patch large, form- 

 ing an equilateral triangle. Barbels very short and slender, the 

 nasal i of the head and reaching little more than half way to the 

 eye; maxillary barbel even shorter than the nasal; postmental 

 barbel inserted well inside and behind the angle of the mouth, 

 reaching in a direct line midway to the gill- opening, and f of the 

 head ; mental barbel J longer than the postmental. Greatest 

 width of the isthmus but little less than the interorbital width. 

 Gill-rakers 2 + 6, the longest f of the diameter of the eye. Skin 

 of head above finely vermiculated, below closely studded with 

 minute pores. Axillary pore large. Distance of first dorsal from 

 tip of snout -4^ in the total length; dorsal spine moderate, serrated 



