178 MALACOPTERYGIOUS FISHES. 



cc. Breast destitute of a sucker; and the head covered with a 

 naked skin or minute scales. Gadusid^e. 



d. Bearded. 



e. Three dorsal, and two anal fins- 

 Morhua. 



ee. Two dorsal, and one anal fins. 



/. The first dorsal fin developed and entire. 

 Molva. 

 Physcis. 



ff. The first dorsal fin imperfect, the rays short, 

 Gadus. 

 Raniceps. 



dd. Beardless. 



e. Two dorsal fins. 

 Merlangus. 

 Merluccius. 



ee. One dorsal fin. 

 Brosmus. 

 bb. Sides of the body dissimilar. Eyes on one side. PtEuaONEC- 



c. Dorsal fin reaching to the mouth, and, with the anal, nearly 

 continuous with the tail. 

 Pleuronectes. 

 Solea. 

 ec. Dorsal fin reaching only to the eye, and, with the anal, dis- 

 joined from the caudal. 

 Platessa. , 

 Hippoglossus. 



II. Destitute of ventral Jins. 



a. Gill-opening smaU, and the giU-cover concealed by the skin. 

 AnguUla. 

 Leptocephalus. 



aa. Gill-opening and gill-lid apparent. 

 Ophidium. 

 Ammodytes. 



