216 THE COMMERCIAL SEA FISHES OF 



It has been recorded off the British Isles, by Parnell, up 

 to 15 inches in length. 



B. Teeth conical. 



a. Lateral-line with a slight curve anteriorly. 

 Flounder {Pleuronectes flesus). 



Names. Flounder and mud-flounder, flounder lantern, 

 Cornwall ; fresh-water fleuk and bigger fleuk, Moray Frith ; 

 mayock fleuk, Edinburgh ; fleuk, Northumberland ; also 

 flewke and fluck ; butt, Yarmouth ; sea bague, Isle of Man 

 (Crellin) ; black back, Belfast Bay. 



B. v., D. 60-62, V. 6, A. 39-45, L. I, 85, Caec. pyl. 2, Vert. 



12 | 23-24. 



Length of head 4 ; height of body 2\ in the total 

 length. Eyes. Less than I diameter apart, and the lower 

 slightly in advance of the upper. The eyes are so promi- 

 nent that they are capable of observing objects on both sides 

 of the head. Lower jaw in advance of the upper. The length 

 of the maxilla equals about a quarter that of the head, 

 but does not reach to beneath the eyes. Teeth. Conical, 

 blunted ; two rows in the upper and one in the lower jaw. 

 The outer row on the upper jaw of the blind side consists 

 of 15 teeth, the corresponding row in the lower jaw of 

 about 17. Fins. Dorsal commences opposite the middle 

 of the upper eye ; its longest rays are in the posterior half 

 of the body. Ventrals free. A strong spine, pointing 

 forwards, exists before the base of the anal fin, which latter 

 is similar to the dorsal. Caudal cut square. Scales. 

 Small, cycloid ; rudimentary ones on the cheeks. A 

 rounded and rough tubercle between the bases of each of 

 the dorsal and anal rays. Lateral-line. Commencing 

 opposite the angle of the mouth, curves round the lower 



