I 



5. MONACANTnXJS. 251 



II. Anal Jin with 40 (yj) or more rays. Ventral spine nauc : Aluteres. 

 A. Dorsal s/rine above the urhit. 

 1. Dorsal spine with distinct barbs. 



34. Monacanthus heudelotii. 



Aluterus lieuJelotii, ILtllard, Ann, He. Nat. 1855, iv. p. 13. 

 D. 37. A. 41. 

 Skin tincly velvety. Body oblong, its depth being one-third of 

 the total length, withont caudal fin, which is elongate, and one- 

 fourth of the total. Snout with the upper profile straight. Dorsal 

 spine large, armed M'ith barbs in front and behind, situated above 

 the orbit. Ventral spine none. Uniform brown. {Hollard.) 

 Senegal. 



a. One and a half inch long. Congo expedition. 



2. Dorsal spine feeble, rough, butxoitho^d barhs. 



35. Monacanthus monoceros. 



Acara muca, Willmjhby, tab. E. 2. fig. 2. 



Valmt. fig. 310 ; Renard, i. pi. 4. fig. 34, ii. pi. 4. fig. IG. 



liiilistes, sp., Gronov. Zoojjhi/l. no. 193. 



Balistes monoceros, Osbeck, It. p. 110; L. Sust. Nat. i. p. 404 ; Bl. 



tab. 147; Bl. Schn. p. 462. 

 Capriscus, sp., Klein, Pise. Miss. iii. p. 25. no. 8, tab. 3. fig. 11. 

 Lija barbuda, Parra, p. 48, lam. 22. fig. 2. 

 13alistes kleiuii, Gm. L. p. 1472. 



monoceros, vai'. uuicolor, Bl. Schn. p. 463. 



seiTaticomis, Freminv. Nouv. Bidl. Sc. Soc, Philom. no. 67, 



p. 249, tab. 4. fig. 1. 

 jVleuteres berardi, Less. Voy. Coo. Zool. p, 107, pi. 7 ; Richards. Voy. 



Sul2}h. Ichth. p. 132, pi. 61. fig. 1. 

 Alutera cinerea, Schley. Faun. Japon. Poiss. p. 292, pi. 131. fig. 1. 

 ? Balistes imicornu, Basiletvsky, Nouv. Man. Soc. Nat. Mosc. x. 1855, 



p. 263. 

 Alutarius macracanthus, Bleek. Verh. Bat. Gen. xxiv. Balist. p. 22, 



pi. 3. fig. 6. 



ampliacanthoides, Bleek. I. c. p. 23, pi. 2. fig. 5. 



obliteratus, Cant. Mai. Fish. p. .353. 



Balistes linguatula, Gronov. Syst. ed. Gray, p. 35. 

 Aluterus anginosus, Hollard, Ann. Sc. Nat. 1855, iv. p. 11. 

 Alutera giiutheriaua, Poey, Proc. Ac. Nat. Sc. Philad. 1863, p. 184. 

 Aleuteres monoceros, Bleek. Ned. Ti/ds. Dierk. iii. 1865, p. 28 ; Atl. 



Ichth. V. p. 140, pi. 226. fig. 2. 



D. 48. A. 50. Vert. 7/13. 

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

 less than two-fifths of the total length (without caudal). Snout 

 produced, with the upper profile convex. Dorsal spine feeble, above 

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

 pectoral fin below, the orbit. Caudal fin sublruncate, much shorter 

 than the head ; dorsal and anal fins low. Ventral spine none. 

 Uniform brownish. 



