BY J. DOUGLAS OGILBY. 74:1 



preopercle, the isthmus twice as wide as the iuterorbital region; 

 five branehiostegals; pseudobranchise present, small; gill-rakers 

 short, stout, and serrulate. Dorsal fins separate, with vi, i 8-9 

 rays, the spinous ones flexible; anal fin commencing well behind 

 the origin of the second dorsal, with i 8-9 rays; the last soft ray 

 of the second dorsal and anal fins divided to the base; ventral 

 fins not in contact basally, inserted below the root of the pectorals, 

 with i 5 rays, the fourth the longest, but not produced into 

 crinoid fihxments; pectoral fins rounded, with 18 or 19 rays, the 

 middle ones the longest; caudal fin rounded, the peduncle strong. 

 Genital papilla large, triangular in the male, oblong in the female. 

 Scales moderate and adherent, those of the occiput about as large 

 as those of the tail and a little larger than those of the trunk; 

 head partially scaly, the interorbital region, snout, and anterior 

 portion of the cheeks naked; scales of the head, nape, and throat 

 cycloid, all the rest ciliated and finely carinated ; head with 

 numerous series of small pores. Yertebrte 28 (12-1-16). 



E ty mol ogy. — Xamed after the district in which the typical 

 species was first obtained and where it is abundant. 



T y J) e. — Eleolris coxii, Krefi"t. 



D i s t r i b u t i o n. — Coastal region of New South Wales. 



MULGOA COXII. 



Eleotris coxii, Krefft, Proc. Zool. Soc. London, 1864, p. 183; 



Macleay, Proc. Linn. Soc. N.S. Wales, v. 1880, p. 618 (1881); 



Ogilby, Catal. Fish. N.S. Wales, p. 36, 1886. 

 Eleotris rich arc] sonii, Steindachner, Sitzb. Ak. Wien, liii. i, 



1866, p. -155, c. fig.; Ogilby, I.e. 

 Eleotris laastersii, Macleay, I.e. p. 622; Ogilby, I.e. 



Cox's Gudgeon. 



D. vi, i 8-9. A. i 8-9. P. 18-19. Sc. 37-40/11. 



Body stout and moderately elongated, the tail compressed. 

 Length of head 3§ to 3y"y, depth of body 4| to 5| in the total 

 length; head as wide as or a little wider than deep, its width 1^ 

 49 



