CHAP. XX.] FISHES. 437 



Family 46.— MASTACEMBELIDiE. (2 Genera, 9 Species.) 



" Fresh-water fishes, with eel-like bodies and very long dorsal 

 fin." 



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 



