AL'SIKALIAN (lOlUIPiE McCULLOCII AND OflHJ'.Y. 271 



Genus Butis, lileeker. 



Jiiitis, Bleeker, Nat. Tiitlschr. Ned. liid., xi., 1S5G, p. 412 (I'Jleufrii Initis, 

 Buchanan). 



Body robust, compressed ; liead depressed, tlie snout, produced with 

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

 scalelets covei'ing tlieir basal poi'tions ; they nve everywhere sti-ongly 

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

 head. Naked mncigerous 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 ])resent on the preopei-cular 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. Pseudobranchife 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 fi-ee rays. Ventrals i/5, widely separated, tlie fourth 

 rays longest. Caudal narrowly rounded. 



The above definition is based on B. hntis and B. amhoiiieiisis. 



Bdtis amboinensis (Bleel-er), Bay. 

 (Plate xxxvi., fig, 4). 



Elentrifi amhoinejisis, Bleeker, Nat. Tijd. Ned. Ind., v., 1853, p. 343. Id., 

 Giinthei', Brit. Mus. Cat. Fish., iii., 1861, p. 117. LI, Buy, Fish. 

 India, 1876, p. 316. 



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



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



Prionohutis buccata, Bleeker, Ibid., — Jide Day. 



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



Bntis lougieanda, 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. butis, Buchanan). 



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

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



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

 head 28 in the same. Eye 61 in the head, and 208 in the snout, which 

 is 2'9 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 pectoi-als slightly less than the depth. 



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

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

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



