FISHES. 205 



bb. No teeth on the vomer ; anal spines 1 or 2 ; lateral 

 line usually running up on the caudal fin. 



SCI^ENID^E, 94. 



aa. Edges of opercular bones entire. 

 /. Scales well developed, not enlarged along lateral line ; 

 chin often with barbels ; no free spines. 



Scicenidce, the Maigres. 

 ff. Scales minute ; no barbels. 



g. Body more or less compressed and elevated ; scales 



sometimes enlarged along lateral line; usually 



2 free anal spines. Carangidce, the Pilot Fishes. 



gg. Body long and low ; no free spines nor lateral 



shields. . . . Gobiidce, the Gobies. 



ft Body entirely scaleless. 



n. Body more or less depressed ; eyes high up on the broad 



head ; caudal usually rounded. 



i. Dorsal with 4 spines; ventrals jugular 1,5; mouth 

 vertical. . . Uranoscopidce, the Star Gazers, 

 ii. Dorsal with 3 spines; ventrals jugular I, 2; mouth 

 broad, with conical teeth. 



Batrachidce, the Toad Fishes. 



ui. Dorsal spines 6 or more ; ventrals thoracic ; cheeks 

 mailed (i. e., the sub -orbital bone extending back 

 ward over the cheek, articulating with the pre- 

 opercle). 



Spinous dorsal shortest, its middle rays highest; 



head without barbels. . . COTTID^E, 95. 



Spinous dorsal longest, notched, its first rays highest ; 



head with many fleshy slips. 



Hemitripteridce, the 8ea Ravens. 



hh. Body greatly compressed ; the eyes lateral or anterior ; 

 fins often filamentous ; tail usually slender, the caudal 

 fin widely forked. 



j. A series of bony shields along base of second dorsal. 



Zenidce, the John Dories, 

 jj. No bony shields ; usually two free anal spines. 



Carangidm, the Pilot Fishes 



