ARRANGEMENT. 457 



Division. Page, 



r Caudal fin forked 7 



\ Caudal fin not forked 8 



( Under jaw longest Ammodytes. 399 



( Under jaw shortest Xiphias. 215 



(Teeth very strong and prominent AnarrUclias. 230 



( Teeth wanting Syngnathus. 394 



( One dorsal fin 10 



9. ^ 



I More than one dorsal fin* 34 



{ Both eves on the same side of the head 11 



10. ] 



( One eye on each side of the head 14 



( Caudal fin rounded at the extremity 12 



11. I 



( Caudal fin orescent-shaped at the extremity.... Ilij^poglossiis. 372 



( Eyes on the right side of the head 13 



( Eyes on the left side of the head Rhombus. 373 



( Dorsal and caudal fins separate Platessa. 361 



( Dorsal fin reaching quite to the caudal Solea. 378 



•M 



Dorsal fin commencing before or over pectorals. 15 

 Dorsal fin commencing remote from pectorals. 25 



r Caudal fin forked 16 



15. ■! 



' (.Caudal fin not forked 18 



r Teeth present 17 



■ (.Teeth wanting Lamprls. 223 



{Anterior part of the dorsal fin without scales . . . Pagellus. 203 



Anterior part of the dorsalcovered with scales.. JBranta. 209 



18. 



^ Chin with a long barhule Srosmius:. 357 



I Chin without a barbule 19 



1 Anal and caudal fins not contiguous 20 



( Anal and caudal fins contiguous 24 



" The first dorsal fin is sometimes very small and composed of fine rays 

 which make it liable to be overlooked, as in the Tadpole Fish (Raniceps), 

 Rockling (Motella), &c. ; the first dorsal fin in the Angler (Lophius), is ra- 

 ther inconspicuous; the Dory (Zeus) has but one dorsal fin which is deepl}' 

 abbreviated in the middle, appearing at first sight as if two fins ; the Stickle 

 tacA: (Gasterosteus), I have here considered as having but one dorsal fin; 

 in the Salmonidce the second dorsal, or adipose fin, is without rays and itu- 

 ated over the posterior part of the anal fin. 



