ACANTHOPTERYGII. 141 



and anal fins, which is clavate, and for a similar inflation of the 

 crest of the cranium.(l) 

 In a second subdivision, from the Indian Ocean, there are three 

 spines in the anal, and long and pointed pectorals.(2) 



A third, also from the Indian Ocean, has four anal spines, and 

 very small scales. 



One species, Chxtodon argus, L., BL, 204, 1, has the reputa- 

 tion of feeding, de preference, upon human excrement. (3) 



Another species of this same subdivision has been discovered 

 in a fossil state in Mount Bolca.(4) 

 The Taurichtes are Ephippii of India, which have an arcuated 

 and pointed horn over each eye. (5) 



HoLACANTHus, Laccp. 



A large spine at the angle of the preoperculum, and the edges of 

 the same bone, in most species, dentated. Their flesh is excellent, 

 and they are remarkable for the beauty of their colours, and the re- 

 gularity with which they are distributed. Numerous species abound 

 in both oceans. (6) Their form is oval or oblong j we may separate 

 from them the 



POMACANTHUS, CuV. 



In which the form is more elevated; a circumstance resulting from 

 the more sudden rise of the edge of the dorsal. (7) The only species 

 known are from America. 



(1) Add: Chxtodon fdber, Brousson., BL, 212,2, of which the Chxt. Plumi- 

 tri. Id., 211, 1, may bea vai'iety; Chxt. orhis, Bl., 202, 2. 



(2) Chset. punctatus, L., or Latte, Russ., 79; Chwt. longimanus, Bl., Schn., 

 Russ,, 80-, Eph. teria, Cuv. Russel, 81. 



(3) Add, Chaet. tetracanlhus, Lacep. HI, xxv, 2. 



(4) Ittiolitologia Veronese, pi. v, f. 2, where it is figured as the Argus, but it is a 

 different species. 



(5) The Buffalo-fish of the Malays, TauHchthys varius, Cuv., well figured by 

 Ren. I, XXX, 164, Valent., No. 71; T. viridis, Ren., IT, x, 49, Valent., No. 161. 



(6) American species, Chset. ciliaris, L., BL, 214, or Isabelita, Parra, VII, 1, or 

 Chsnt. couronn^, Desmar., Dec. Icthyol.; Chset. tricolor, BL, 425; Duham., Sect. 

 IV, pi. xxiii, 5- India species, Chast. bicolor, BL, 206, 1; Ch. mesoleucos, Bh, or 

 laesomelas, Gm., BL, 216, 2; Holac. amicalis, Cuv., Ren. I, xvi, 92; Ch. annularis, 

 BL, 215, 2; Ch. imperator, BL, 194; Ch. fasciatus, BL, 195, Ch. nicobariensis, 

 BL, Schn., 50, or Geometricus, Lacep., lY, xiii, 1; Hoi. Lamark, Lacep., IV, 531, 

 Renard, I, xxvi, 144, 145, and several new species. 



(7) Chxt. aureus, BL, 193, 1, or Chirivita jaune, Parra, VI, 2; Chxt. paru, BL, 

 197, or Chirivita noir. Parr., VI, 1; Ch. 5-cinctus, Cuv., Guaperva, Marcgr., 178; 

 Ch. arcuattts, L., BL, 204, 2. 



