6. MACROPUS. 381 



are ncarlj' of e(|ual length and meet at a rij^lit angle ; the lower is 

 slightly curved. 'J'herc are ten alidoininal and sixteen caudal vertebra', 

 the length of the former portion of the vertebral column being to 

 that of the caudal as 1 : 1-4. The vertebra) are compressed, as high 

 as long ; neurals, hajmals, and the intcrneurals and interha^mals of 

 the spinous portions of the fins of moderate length and strength ; 

 the haemals arc longer than the neurals ; the first interhcemal and 

 haemal form together a strong curved bone, as 'n Osjihromemis ; the 

 five folloA\ing interhasmals are received between the two bones men- 

 tioned. Ribs well develojied, with cpiplem-als. 



(5. Poly acanthus cupanus. 



Cur. 4'- Val. vii. p. .'557. 



i5rownish-grey, with a small blat;k spot on each side of the root of 

 the caudal fin. Caudal rays dotted with black. (Cuv.) 

 liiver Aruin-Coupang (Pondicherry). 



7. Poly acanthus deissneri. 



Osphromenus deissneri, B/cckcr, Aafi/iirk. Tydschr. Nedcrl. LuL xviii. 

 1859, p. 37G. 



D. i^. A. '-. L. lat. 30. 



6 8 



The height of the body is contained thrice and three-fifths in the 

 total length (the caudal fin not included), the length of the head 

 thrice and one-fifth. ProGorbital indistinctly denticulated. The 

 upper profile of the snout is oblique, straight. Lateral line incon- 

 spicuous, llose-coloured : a black band along the dorsal and ventral 

 lines ; two black longitudinal bands on each side ; the lower part of 

 the side of the head black-spotted ; dorsal, anal, and venti'al fins 

 reticulated with black. (Bl.) 



Kivers of Batm-ussak (Island of Bawean). 



6. MACROPUS. 

 Macropodus, Laa'p. iii. p. 417. 



Body compressed, oblong ; operculum without spine or serrature ; 

 cleft of the mouth rather small, not extending beyond the vei'tical 

 from the orbit. Small fixed teeth in the jaws, none on the palate. 

 Dorsal and Snal spines numei'ous (13-18) ; ventral fins composed 

 of one.spine and five rays, which arc well developed ; the soft dorsal 

 and anal, the caudal and ventral elongate. Caudal forked. Lateral 

 line absent. Branchial arches M'ith toothed tubercles. Air-bladder ? 

 Pyloric appendages in small number ; intestine of moderate length. 



Fresh waters of China and Cochinchina. 



This may prove to be a domestic variety of a species of Pohj- 

 acanthvs. 



