740 ox SOME AUSTRALIAN ELEOTRINiE, 



to the base; ventral fins .small, not in contact basally, inserted 

 beneath or somewhat in front of the base of the pectorals, with 

 i 5 rays, the fourth soft ray the longest, but not produced or 

 filiform; pectoi'al fins large and pointed, with 18 or 19 i-ays, the 

 middle ones the longest; caudal fin rounded, the peduncle rathei- 

 slender. Genital papilla small. Scales moderate and adherent, 

 those of the tail much larger than those of the trunk; entire head, 

 except a portion of the occiput, naked; scales deeply embedded, 

 cycloid and smooth in front, imbricate and feebly ciliated behind ; 

 muciferous system of head well developed. Vertebrae 30 (13 + 17). 

 Etymology. — 'dcfits, a snake; ptV, snout. 

 Type. — Eleotris grandiceps, KrefFt. 



Distributio n. — Coastal region of south-eastern Australia. 

 The following analysis will suflice to distinguish the two species 

 here described : — 



Width of head If-lf, of interorbital region 4|-5|, length of 

 fourtli ventral ray If-lf, of caudal peduncle If-lf in the 

 length of the head; inner .series of teeth enlarged; 11-1 2 gill- 

 rakers; scales 42 or less along the middle of the body 



gra^idicejjs, p. 746 



Width of head ly-2, of interorbital region 5|-6|^, length of 



fourth ventral ray 2-2|, of caudal peduncle li-l|- in the 



length of the head ; all the teeth subequal ; 7-9 gill-rakers; 



scaler 43 or more along the middle of the body 



nudiceps, p. 748 



Ophiorrhinus grandiceps. 



Ehotris grandicepv, KreiFt, Proc. Zool. Soc. London, 1864, 

 p. 183; Macleay, Proc. Linn. Soc. N.S. Wales, v. 1880, p. 618 

 (1881); Ogilby, Uatal. Fish. N.S. Wales, p. 36, 1886. 



Flat-headed Gudgeon. 



D. vii. i 9-10. A. i 9. P. 19. Sc. 38-42/12. 



liody moderately elongate, tapering from the shoulder, the 

 tail strongly compressed. Length of head 2-^^ to 3^ depth of 



