CHAP. XX.] FISHES. 437 



FAikiiLY 46.— IMASTACEMBELID^. (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.— XOTACANTHI. (1 Genus, 5 Species.) 



" Marine fishes, with elongate bodies covered with very small 

 scales, and snout protruding beyond the mouth." 



DiSTEiBT'TiON. — Greenland, Mediterranean, and "West Aus- 

 tralia. 



Onlcr IT.—ACANTHOPTERYGII PHARYNGOGNATHl. 



Fajiily 48.— POMACEXTPJD^:. (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.— LABEIDiE. (46 Genera, 396 Species.) 



" Herbivorous or carnivorous marine fishes, with elongate 

 bodies covered with cycloid scales, and teeth adapted for 

 crushing the shells of mollusca." 



Disteibution. — Temperate and tropical regions of all parts 

 of the globe. 



The genera Lahrvs, Crcnilahrus, Gtenolahrus, Acantlwlahrus, 

 Centrolahrus, and Coris, have occurred in Britisli seas, and all of 



