CHAP. XX.] 
FISHES. 
437 
Family 46. — MASTACEMBELIDHC. (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. — FTOTACANTHI. (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—ACANTHOPTER YGII PIIAR YNGOGNA TH1. 
Family 48. — POMACENTRIDiE. (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. Pomacentrus, Glyphi - 
dodon, and Heliastes are Atlantic genera. 
Family 49. — LABEIDiF. (46 Genera, 396 Species.) 
“ Herbivorous or carnivorous marine fishes, with elongate 
bodies covered with cycloid scales, and teeth adapted for 
crushing the shells of mollusea.” 
Distribution. — T emperate and tropical regions of all parts 
of the globe. 
The genera Labrus, Crenilabrus, Gtenolabrus, Acantholabrus, 
Centrolabrus , and Coris, have occurred in British seas, and all of 
