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FISHES. 
Genus 5. —MONOCANTHUS. — Cuvier. 
Generic Character .—Each jaw provided with eight teeth set 
in a single row; scales of the body very small and scabrous; 
extremity of the pelvis protruding and spinous. 
Genus 6. —ALUTERES. — Cuvier. 
Generic Character. —Jaws provided with eight teeth each, set 
in a single row; body oblong; skin covered with thickly set 
extremely small granules; a single spine on the first dorsal fin ; 
pelvis not protruding. 
Aluteres monoceros. — The One-Horned Aluteres. 
Plate LXXVI. fig. 5. 
Ash-coloured, with irregular brown undulated patches. One 
foot long. Inhabits the Eastern and American seas. 
Genus 7.—TRIACANTHUS.— Cuvier. 
Generic Character. —Jaws with eight teeth in each; ventral 
fin composed of one large spinous ray; first dorsal fin having 
one large spine and three or four smaller ones; skin beset with 
dense small scales; tail elongated. 
Genus 8.— OSTRACION.— Linnaus. 
Generic Character. —Head truncated, which, with the body, 
are covered with osseous plates; jaws provided with ten or twelve 
conical teeth; with pelvis bones or ventral fins; branchial fins 
with a cutaneous lobe, but having a six-rayed operculum within ; 
having single dorsal and anal fins. 
Ostracion cornutus .— The Horned Trunk-Fish. 
Plate LXXVI. fig. 6. 
Quadrangular; yellow-fawn colour; deeper on the abdomen ; 
head with two horizontal horns; and two curved round horns 
pointing backward, placed on each side of the anal fin. Ten 
inches long. Inhabits the Indian seas. 
