254 SCLERODERMI. 



39. Monacanthus aurantiacus. 



Balistes aurantiacus, Mitch. Lit. 8)- Phil. Trans. N. York, i. p. 468, 



pi. 6. fig. 1. 

 Monacanthus aurantiacus, Dekay, New York Faun. Fish. p. 333, 



pi. 57. fig. 186 ; Storer, Mem. Am. Acad. viii. 1861, p. 423 (pi. 34. 



fig. 3). 

 PAluterus cultrifrons, Hollard, Ann. Sc. Nat. 1855, iv. p. 8, pi. 1. 



fig. 2. 



D. 36. A. 39. 



Skin finely velvety. Body oblong, its depth being two-fifths of 

 the total length (without caudal) [Mitrhill, HoUard]. Snout mode- 

 rately produced, with the upper profile concave ; eye .situated at some 

 distance below the upper profile. Dorsal spine rather feeble, above 

 the middle of the orbit. Part, of the gill-opening in advance 

 of, pectoral fin Ix'low, the orbit. Caudal fin not elongate ; dorsal 

 and anal fins low. Ventral spine none. Orange-coloured, marbled 

 with whitish. 



New York. 



40. Monacanthus punctatus. 



Alutera punctata, At/ass. in Sjti.i, Pise. Bras. p. 137, tab. 72. 

 D. X. A. 40. 

 The height of the body is contained twice and one-fifth in the 

 total length (without caudal). Snout somewhat pointed, with the 

 upper profile concave. Dorsal spine rather slender, curved. Gill- 

 opening below the eye. Caudal fin rounded ; dorsal and anal fins 

 rather low. Ventral spine none. Blackish, with black dots. (Agass.) 

 Brazil. 



B. Dorsal spine in advance of the orbit. 



41. Monacanthus nasicornis. 



Alutera nasicorni.s, Schleq. Faun. Japon. Poiss. p. 223, pi. 131. fig. 2 ; 



Bleek. Nat. Tijds. Ned. Ind. v. p. 352. 

 Aluterus rhinoceros, HoJIard, Ann. Sc. Nat. 1855, iv. p. 19, pi. 1. fig. 5. 

 Pseudaluteres nasicornis, Bleek. Ned. Tyds. Dierk. iii. 1865, p. 28, 



and Atl. Ichth. v. p. 139, pi. 221. fig. l", and pi. 224. fig. 2. 



D. 43. A. 41. 



Body covered with minute, rough scales, oblong, its depth being 

 one-third of the total length (without caudal). Snout rather obtuse, 

 with the upper profile convex. Dorsal spine nearly as long as the 

 head, straight, without barbs, inserted in advance of the orbit. Gill- 

 opening below the hinder part of the orbit ; pectoral fin behind it. 

 Caudal fin shortly rounded ; dorsal and anal fins low. Ventral 

 spine none. A brownish band runs from the eye to the upper part 

 of the root of the caudal. Lower parts witli numerous small white 

 dots. 



Indian Ocean and archipelago ; Japan. 



rt. Adult (5| inches long) : skin. Zanzibar. From Licut.-Col. 



Play fair's Collection. 

 6, c. Adult. Amboyna. 



