110 FISH AND FISH-LIKE ANIMALS OF N.S.W., 



A minute species, 2 inches long, of which adult males are remarkably com- 

 pressed and have huge mouths extending far backward. 



309b. G. lidwilli. Id. McCulloch, Ree. Austr. Mus. xi. 7, 1917, p. 185, 



pi. 31, 2 (PL xxxv.). 

 One of the smallest of vertebrate animals, adults being little more than half 

 an inch in length. 



309c. G. bifrenatus. Bridled Goby. Id. Kner, Novara Zool. i., Fische, 



1865, p. 177, pi. 7, 3. 

 Plentiful on muddy ground and among sea-grass, where it is taken in prawn- 

 nets. Length 6 inches. 



309d. G. semifrenatus. Id. Macleay, P.L.S. N.S.W., v., 1881, p. 598; 



Id. McCulloch & Ogilby, Rec. Austr. Mus. xii. 10, 1919, p. 214, pi. 34, 2 



(Pi. xxxv.). 

 Commonly associated with, and very similar to the preceding species. 

 309e. G. frenatus. Id. Gunther, Brit. Mus. Cat. Fish, iii., 1861, p. 39; 



Id. Kner, Novara Zool. i., Fische, 1865, p. 174. 

 Apparently similar to the preceding species. Length 4 inches. 

 309f. G. lateralis, var. obliquus. Id. McCulloch & Ogilby, Rec. Austr. 



Mus. xii. 10, 1919, p. 249, pi. 34, 4. 

 Common in shallow water in inlets along the coast. Length about 2J inches. 



310. Cryptocextrus Cuv. & Val., Hist. Nat. Poiss. xii., 1837, p. Ill 



(cryptocentrus) . 

 310a. C. gobioides. Crested Goby. Gobius gobioides Ogilby, Cat. Fish. 



N.S. Wales, 1886, p. 35. C. gobioides McCulloch & Ogilby, Rec. Austr. 



Mus. xii. 10, 1919, p. 255, pi. 36, 1 (PI. xxxv.). 

 Not uncommon on muddy grounds, and remarkable for its bright colouration. 

 Length about 4 inches. 



311. Callogobius Bleeker, Arch. Neerl. Sci. Nat. ix., 1874, p. 318 (hasseltii). 

 311a. C. hasseltii, var mucosus. Gobitis mucosus Gunther, F. Zool. Soc, 



1871, p. 663, pi. 63, a. C. hasseltii var mucosus McCulloch & Ogilby, 

 Rec. Austr. Mus., xii. 10, 1919, p. 217, pi. 32, 4 (PI. xxxv.). 

 A southern species which is not uncommon along the coast. Length about 

 4 inches. 



312. Leme De Vis, P.L.S. N.S.W. viii., 1883, p. 286 (mordax). 



312a. L. purpurascens. Id. De Vis, P.L.S. N.S.W., ix., 1884, p. 698; Id. 

 McCulloch & Ogilby, Rec. Austr. Mus. xii. 10, 1919, p. 206, pi. 31, 3 

 (Pi. xxxv.). 

 An elongate fish with minute eyes, and scaleless body, which lives in estuaries 

 of rivers. Length about 9 inches. 



(Tenison Woods, Fish. & Fisher, N.S.W., 1882, p. 27, intimates the oc- 

 currence of Periopthalmodon barbartis Linne, which is almost certainly incorrect). 



Subfamily Eleotrinae. 

 A. Top of head without bony crests. 



B. Cheeks and opercles naked. Philypnodon (313). 



BB. Opercles scaly, cheeks more or less scaly. 



C. Interorbital space scaly. Mogurnda (314). 



CC. Interorbital space naked. 



D. Scales smaller, 37-40. Gobiomorphus (315). 



DD. Scales larger, 27-35. Carassiofis (316). 



AA. Top of head with bony crests. ' Butts (317). 



