136 
PLECTOGNATHI. 
MONACANTHUS, Cm. 
465. Monccanfhus isogramma. [306.] 
Monacanthus isogramma, Bleek. Nat. Tydschr. Ned. Ind. xiii. p. 367 ; Ail. Ichth. v. pi. 222. f. 1 ; and 
Ned. Tydschr. Dierk. iii. 1865, p. 26. 
Zanzibar. Java. 
4-66. Monacantims pardalis. [190.] 
Monacantlius pardalis, Rupp. N. W. Fische, p. 57, t. 15. f. 3. 
Limonacantlius pardalis, Bleek. Atl. Ichth. v. pi. 230. f. 2; and Ned. Tydschr. Dierk. iii. 1865, p. 27. 
Zanzibar. Red Sea. Indian Ocean and Archipelago. 
467. Monacantlius fronticinctus, sp. n. PI. XIX. fig. 2. [521, 665.] 
D. 1 | 33. A. 30. 
The height of the body, with the pelvic process stretched out, is about one-half of 
the total length without caudal. Snout moderately produced, its upper profile rather 
concave. Dorsal spine slender, as long as the distance between the eye and the mouth, 
slightly denticulated behind, the teeth being comparatively longer in smaller specimens 
than in adults. Free portion of tail a little higher than long, the sides having an 
elongated patch of setiform spines. In young specimens [521] the second dorsal ray is 
produced into a long filament as in M. cirrhifer, Schleg. 
Colour dirty greenish brown, with several more or less distinct black longitudinal 
bands on the sides. A black band across the forehead between the anterior margins of 
the orbits. Fins dirty brown. 
Length from 5 to 9 inches. 
Zanzibar. 
ALEUTERES, Cm. 
468. Aleuteres monoceros. [743.] 
Batistes monoceros, Osbeck. 
Aleuteres berardi, Less. Zool. Voy. Coqu. Poiss. pi. 7; Richards. Ichth. Voy. Sulph. p. 132, pi. 61. f. 1. 
Alutera cinerea, Schley. Faun. Japan, p. 292, pi. 131. f. 1. 
Alutarius obliteratus, Cant. Mai. Fish. p. 353. 
Aleuteres monoceros, Bleek. Atl. Ichth. v. pi. 226. f. 2 ; and Ned. Tydschr. Dierk. iii. 1865, p. 28. 
Zanzibar. East-Indian archipelago. China. Japan. Atlantic shores of America. 
469. Aleuteres nasicornis. [292.] 
Alutera nasicornis, Schley. Faun. Japan, p. 223, pi. 131. f. 2. 
Pseudaleuteres nasicornis, Bleek. Atl. Ichth. v. pi. 221. f. 1, & 224. f. 2; and Ned. Tydschr. Dierk. 
iii. 1865, p. 28. 
Zanzibar. Mauritius. East-Indian archipelago. Japan. 
