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CHAP. XX.] FISHES. 437
Family 46.—MASTACEMBELIDiE. (2 Genera, 9 Species.)
fin."
" Fresh-water fishes, with eel-like bodies and very long dorsal
Distribution.—Eivers 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 Aus-
tralia.
Order IL—ACANTHOPTERYGII PHARYNGOGNATHl.
Family 48.—POMACENTEID^. (3 Genera, 143 Species.)
" Marine fishes, with short compressed bodies covered with
toothed scales, and with feeble dentition."
Distribution.—Tropical parts of Pacific and Indian Ocean,
less numerous in Tropical Atlantic, a few reaching the Medi-
terranean, Japan, and South Australia. Fomacentrus, Glyphi-
dodon, and Heliastes are Atlantic genera.
Family 49.—LABRIDvE. (46 Genera, 396 Species.)
"Herbivorous or carnivorous marine fishes, with elongate
bodies covered with cycloid scales, and teeth adapted for
crushing the shells of moUusca."
Distribution.— Temperate and tropical regions of all parts
of the globe.
The genera Lahrus, Crenilahrus, Gtenolahrus, Acantholahrus,
Centrolabrus, and Coris, have occurred in British seas, and all of