AUSTRALIAN GOBIID^ McCULLOCH AND OGILBT. 271 



Genus Bdtis, BleeJcer. 



Butts, Bleeker, Nat. Tijdschr. Ned. Ind., xi., 1856, p. 412 (Eleotrii hulls, 

 Buchanan). 



Body robust, compressed ; head depressed, the snout produced with 

 the mandible projecting. Scales large and angular, with one or more 

 scalelets covering their basal portions ; they are everywhere strongly 

 ctenoid, and extend forward to the nostrils and cover the sides of the 

 head. Naked mucigerous canals extend from the snout, around each side 

 of the interorbital area, to the shoulder and around the preopercular 

 border ; they are defined by distinct osseous crests. Several open pores 

 are present on the preopercular border. Mouth large, oblique ; teeth in 

 a band in each jaw, and either uniformly villiform or with the outer series 

 enlarged. Tongue spatulate, free anteriorly. No barbies. Gill-openings 

 extending well forward below, the isthmus narrow; exposed edge of the 

 shoulder-girdle smooth. Pseudobrancliife present; anterior gill-rakers of 

 the first arch stout, about six on the lower limb. Dorsal fins short, with 

 about vi/9 rays ; anal similar to the second dorsal. Pectorals narrowly 

 rounded, without free rays. Ventrals i/5, widely separated, the fourth 

 rays longest. Caudal narrowly rounded. 



The above definition is based on B. hutis and B. amhoinensis. 



Bdtis amboinensis (Bleel-er), Day. 

 (Plate xxxvi., fig, 4). 



Eleotris amboinensis, Bleeker, Nat. Tijd. Ned. Ind., v., 1853, p. 343. Id., 

 Giinther, Brit. Mus. Cat. Fish., iii., 1861, p. 117. Id., Day, Fisli. 

 India, 1876, p. 316. 



Eleotris buccata, BIyth, Journ. Asiat. Soc. Bengal, 1860, p. 145. 



Butis amboinensis, Bleeker, " Eleotriformes", 1874, p. 5 — fide Day. 



Prionobutis buccata, Bleeker, Ibid., — fide Day. 



Eleotris loiujicauda, De Vis, Proc. Linn. Soc. N.S.Wales, ix., 1884, p. 691. 



Butis longicanda, Ogilby, Proc. Roy. Soc. Qld., xxiii., 1910, p. 22. 



Eleotris papa (De Vis, M. S.) Ogilby, Ibid., p. 24. 



Eleotris butis, Ramsay & Ogilby, Proc. Linn. Soc. N.S.Wales (2), i., 

 1886, p. 8 (not E. hutis, Buchanan). 



D. vi/9; A. 9; P. 17; V. i/5; C. 15. 29 scales between the axil 

 and the hypural joint, and 11 between the anterior dorsal and anal rays. 



Depth before the dorsal fin 47 in the length to the hypural joint; 

 head 2"8 in the same. Eye 61 in the head, and 2"08 in the snout, which 

 is 29 in the head. Interorbital space one-third broader than the eye, 1*3 

 in the snout. Depth of caudal peduncle 203 in its length, which is 1*3 

 in the head. Breadth before the pectorals slightly less than the depth. 



Head depressed, much broader than deep ; its upper profile slightly 

 concave. Sharp bony ridges are present on the upper surface of the head 

 between the nostrils, surrounding the orbits, above the opercular margins. 



