248 



THE SCIENCE OF LIFE. 



carried on by muscular little pouches (marsiipia) placed 

 on the sides of the neck. 



Order 3. Teleosts, (teleios, perfect ; osteon, a bone,) in- 

 cludes all the true osseous fishes. The skull is compli- 

 cated, the upper and lower jaws complete, and the gills 

 are comb-like, or tufted. The tail is Jiomoccrcctl, having 

 equal lobes. The other fins vary in number and position. 



a 



FIG. 145. Gray Mullet : a. First dorsal fin. b. Second dorsal, c. Pectoral, d. Ventral. 

 e. Anal. f. Caudal. 



In the soft-finnecl Fishes, the ventral fins (Fig. 145) are 

 absent, as in the Eels ; or attached to the abdomen, as 



FIG. 146. The Cod. 



in Salmon, Herring, Pike, and Carp; or placed under the 

 throat, as in the Cod, (Fig. 146,) Haddock, and Flounder. 



