Key to the Fishes. 



Belly fins inserted behind breast fins : 

 Back fins all soft rayed. 



Two back fins, the last in fleshy hump ; having teeth . 



no visible teeth 



One back fin only (the second) ; large mouth . 



small mouth . 



Nos. I to 7 



Nos. 8 to 10 

 Nos. ii to 14 



Nos. 15 to 18 



One back fin only (the first) sucking mouth Nos. 20 and 21 



body cylindrical Nos. 22 to 28 



body flat Nos. 19. 29 to 34 



Nos. 35 to 44 



Back fins spinous rayed ; two free fins . 



two connected fins 

 ") One sharp stinging spine in each forward fin 



Nos. 45 to 48 

 Nos. 49 and 50 



No. 57 

 No. 58 



Several sharp stinging spines instead of first back fin Nos. 51 to 56 



Belly fins inserted in front of breast fin on the throat : 



With soft rays 



With spinous rays 



With no belly fins : 



With biting mouth No. 59 



With sucking mouth Nos. 60, 6. 



(4) 



