178 PERCID.^. 



channel, runs along the inner part of the praeoperculiim, is in com- 

 mimication with the scapular stem, and passes beneath on the man- 

 dibula ; there are several small openings on the prajoperculum, but 

 not so regular as those on the mandibula, where we find distinctly 

 three : an entrance-opening behind on the articulaiy, a second be- 

 tween the angular and dentary, a third on the dentary, and, besides, 

 a few very small irregular ones in front. Thus we have here, with 

 slight modifications, and in a rather less developed degree, the same 

 muciferous system as in Acerina cernua, or, in fact, in all the 

 Percoids, but in a more or less nidimentary state. 



The length of the abdominal vertebral column is to that of the 

 caudal as 11 : 17. The first intcrhaemal spine is trihedral, of 

 moderate size, and attached to the eleventh haemal; its length is 

 equal to that of the second vertebra to the ninth. 



There are two rather small canines on each side of the upper jaw ; 

 the villiform band reaches to the end of the bone, and has several 

 sti'onger teeth in the outer row. In the lower jaw the villiform 

 band does not extend on the sides of the bone, there being only a 

 single series of stronger teeth, continued also on the front of the 

 jaw. Separate canines cannot be distinguished. The band on the 

 vomer forms a rather obtuse angle ; that on the palatine bones is 

 short and narrow. 



4. Genyoroge bengalensis. 



Rmard, Poiss. i. t. 20. f. 110 ; ValenU/n, Ind. iii. f. 25. 



Scisena kasmha, ForskaJ, p. 46. 



Ilolocenti-us bengalensis, Block, t. 246. f. 2 ; Bl. Schn. p. 316. 



quinquelinearis, Bloch, t. 239. 



Grammistes Itasmira, Bl. Schn. p. 189. 



Labnis octolineatus, Lacep. iv. p. 478. pi. 22. f. 1. 



kasmha, Lacep. iii. p. 483. 



Perca polyzonias, Forst. Anim. cur. Licht. p. 225. 

 Diacope octoliueata, Cuv. 4" T'o/. ii. p. 418, vi. p. 526 ; Faun. Japan. 

 p. 12. pi. 6. f. 2 ; Richards. Ichthyol. China, p. 229. 



decemlineata, Cuv. Sf Veil. \\. p. 528. 



Mesoprion etaape. Less. Voy. Coq. Zool. p. 229. 

 octolmeatus, Bleeker, Perc. p. 40. 



The length of the head is equal to the height of body, and 3^ in 

 the total ; the diameter of the eye is 3| in the length of the head. 

 The vertical and the horizontal margins of the prreoperculum den- 

 ticulated. Caudal fin emarginate. Yellowish ; on each side foui' or 

 five blue longitudinal bands. 



Eed Sea ; Isle de France ; East Indian Seas ; Polj-nesia. 



a, h. Adult. Cliina. 



c. Adult : skeleton. India. 



d, e. Adult. India. Old Collection. 



/. Half-grown : bad state. India. From Mr. Frank's Collection. 

 rj. Fine specimen. Feejee Islands. Voyage of the Herald. 

 h. Adult : stuifed. Louisiade Archipelago ; Chaumont Island. 

 Voyage of the Eattlesnake. 



