256 THE FISHES OF NEW GUINEA, 



286. Apogon trimaculatus. Cuv. and Val. 



Gunth. Cat. 1 p. 233. Less Voy. Coq. Zool. p. 237. 



Apogon Amboinensis previously recorded, was also included in 

 this collection. 



Genus Tetracentrum. 



Six branchiostegals. Teeth viliform with an outer series of 

 larger ones ; teeth on the vomer and palatine bones. One dorsal 

 fin ; the anal fin with four spines. Operculum without spine ; 

 praeoperculum with a double denticulated edge. Scales large, 

 rather deciduous. 



I place this genus with that section of the Percidae named by 

 Dr. Gunther Apoyonlna, on account of a general resemblance in 

 form, its large deciduous scales, and double-ridged praaBoperculum. 

 The continuous dorsal fin, and four spined anal, are however 

 foreign to thp group. 



287. Tetracentrum apogonoides. n. sp. 



D. 9/10. A. 4/9. L. lat. 30. L. tr. 4/7. 



Body elevated, compressed, the height being about one-half 

 the length, exclusive of the caudal fin ; the length of the head is 

 one-third of the same. The profile from the first dorsal spine to 

 above the eye, is much curved and forms a narrow ridge, above 

 the eye it becomes broad and concave, and towards the snout 

 convex and swollen. The eye is large, its diameter being about 

 equal to the space between the eyes. The mouth is oblique, the 

 lower jaw rather prominent ; the maxillary reaches to the vertical 

 from the anterior third of the eye. The inner double prseopercular 

 edge is strongly toothed at the angle, the outer is very strongly 

 denticulated along its entire edge, the suborbital, pra3orbital t 

 interoperculum and sub-operculum, are also denticulated on the 

 lower edges. The dorsal fin takes its rise a little behind the 

 vertical from the base of the pectorals, the first spine is less than half 

 the size of the second, the ninth is a little longer than the eighth. 

 They are all strong and curved a little backwards. The aual 

 spines are strong, the first less than half the length of the others. 

 The caudal fin is somewhat long, with the lobes rather produced. 



