96 FISHES. 



in which the operculum is dentated and spinous, and the preopercu- 

 lum not only is dentated, but it has a stout spine at the angle, which is di- 

 rected backwards. They are found in the hot parts of both oceans*, 



Myripristis, Cuv. 



These have all the brilliancy, shapes, and scales of the Holocentrums, 

 but their preoperculum has a dentated double border, and wants the spine 

 at the angle. This genus is remarkable for a natatory bladder, divided 

 into two compartments, the anterior part of which is bilobate and attached 

 to the cranium in two places, where the latter is only closed by a mem- 

 brane, and which correspond to the sacs of the ears. They inhabit the 

 hot parts of both oceans f. 



Beryx, Cuv. 



The Beryx differ from the Myripristis in having but a single short 

 dorsal fin, with but a few small spines, almost hidden in its anterior edge ; 

 ten soft rays in the ventral fins J. It is impossible to remove from it the 



Trachichtys, Shaw. 



The Trachichtes, which, with the same roughness that exists in the 

 three preceding genera, and the same little dorsal fin as in the Beryx, 

 have a flat spine at the lower part of the preoperculum, and one on the 

 shoulder ; their abdomen and the sides of their tail are covered with large 

 carinated scales §. 



All the Perches of which we have hitherto spoken, have their ventral 

 fins inserted under the pectorals; there are some genera, however, in 

 which they are differently situated. 



The Percoides Jugulares have their throat further forwards than 

 the pectoral fins. 



Trachinus, Lin. 



The Weevers, or Otter Pikes, have the head compressed, approximated 



name to prevent it from being confounded with the Holocentrus of Bloch and of 

 Lacepede, which contains various other species, Serrani particularly. 



* Holocentrum longipinne, Cuv., which is the Hoi. sogho, Bl. 232; and his Bodianus 

 pentacanthus, or the Jaguaraca of Marcgr. 147; it is also the Scieena rubra, Bl. Schn. 

 Catesb. II, ii, 2; and the Amphiprion matejeulo, Bl. Schn. Parra, XIII, 2; — Hoi. 

 vrientale, Cuv. Seb. Ill, xxvii, 1; — Hoi. rubrum, Bennet, Fishes of Ceylon, pi. iv; — 

 Hoi. leo, Cuv. Ren. I, xxvii, 148, a very bad figure; — Scieena spinifera, Forsk. ; — Hoi. 

 hastatum, Cuv. et Val. Ill, lix; — Hoi. diadema, Lacep. Ill, ix, 3, or Perca pulchella, 

 Bennet, Zool. Journ. Ill, ix, 3; — H. sammara, or Sciana sammara, Forsk, or Labrc 

 anguleux, Lacep. Ill, xxii, 1, and the other species described in our third volume. 



f Myripristis jacobus, Cuv., Desmar. Diet. Class. d'Hist. Nat.; — M. japonic us, Cuv. 

 et Val. Ill, lviii; — M. botche, Cuv. Russel, 105; — M. parvidens, Cuv. Id. 109; — the 

 Lutjan hexagone, Lacep. IV, 213; his Holocenlre Thunberg, lb. 367; his Centropome 

 rouge, lb. 273; the Sc'ucna murdjan, Forsk, also belong to this genus. See its history 

 in the third volume of our Icthyology. 



X Beryx decadactylus, Cuv. et Val. Ill, 222; — B. Unealus, lb. 226, and pi. lxx. 



§ Trachichtys austrulis, Shaw, Nat. Misc. No. 578: and Gen. Zool. IV, part II, 

 p. 260. 



