158 



FIRST LESSONS IN ZOOLOGY. 



finities, but supposed to be a degraded eel, is the Euryphar- 

 ynx (Fig. 161) dredged in the Mediterranean Sea. It is .427 

 metre (18 inches) long, with an enormous mouth; it is 

 without fins, and it differs from all other bony fishes in 



FIG. V>l.Eurypharymc pelecanoides. 



having six pairs of internal branchial slits, and consequently 

 five pairs of gills. A similar form lives off New York at 

 great depths. 



The Pouts and Catfish. The horned pout (Amiurus 



FIG. 162. Young Arius, with its yolk-sac, probably taken from the mouth of its 



male parent. 



atrarius) lays its eggs in holes in gravel during midsum- 

 mer. The Great-Lake catfish is sometimes a yard in length. 

 In certain Siluroid fish in tropical seas, as Arius (Fig. 

 162)., the eggs are carried by the males in their mouth, from 

 five to twenty being thus borne about until the young hatch. 



