Distribution.—Tropical seas, both in the Atlantic and Indian Ocean, and as far east as the New Hebrides.
Family 46.—MASTACEMBELIDÆ. (2 Genera, 9 Species.)
"Fresh-water fishes, with eel-like bodies and very long dorsal fin."
Distribution.—Rivers of the Oriental region, one species from Ceram (?).
Family 47.—NOTACANTHI. (1 Genus, 5 Species.)
"Marine fishes, with elongate bodies covered with very small scales, and snout protruding beyond the mouth."
Distribution.—Greenland, Mediterranean, and West Australia.
Order II.—ACANTHOPTERYGII PHARYNGOGNATHI.
Family 48.—POMACENTRIDÆ. (8 Genera, 143 Species.)
"Marine fishes, with short compressed bodies covered with toothed scales, and with feeble dentition."