566 TEN YEARS IN SWEDEN. 



alike, the one coloured, which is turned obliquely upwards 

 when the fish swims, the other white ; anal opening far in 

 front of the body, under the root or middle of the pectorals ; 

 dorsal and anal fins very long, extending along the whole of 

 the back and the under part of the body, even from the 

 pectorals. 



They derive their name, pleuronectis, from their habit of 

 swimming obliquely on their sides. But this is not peculiar 

 to the flounders, for the tenidce do the same. All sea 

 fish. 



The Scandinavian species may be divided into two 

 groups : 



1. Pleuronectes. Both jaws perfect, and visible (not 

 being hid in scales) ; the lower eye a little before the 

 upper one. 



2. Solea. Jaws hidden in a scaly skin; lower eye a little 

 behind the upper. 



Gen. Pleuronectes, L. 

 1. Teeth blunt, placed close together. 



Anal spine wanting. 



139. PLEUEONECTES MICEOCEPHALUS, Don. Pluddermun. 



Lemon Dab. D. 



Jaws of equal length ; body oblong, oval ; lateral line 

 straight ; body altogether smooth. The handsomest of 

 all the family. Colour light brown above, mottled with 

 yellow ; belly white ; skin seems as if it were polished ; 

 head very small; lips swollen; length 12 to 18 in.; 

 height nearly equal to the length of the body. D. 90 ; 

 A. 74. 



Is met with on these coasts from the south of the Sound 

 up to Norway. Spawns here in July. 



Anal spine present. 



140. P. PLATESSA, L. Eod Spatta. The Plaice. D. 



Under jaw longest ; body rhomboidical ; tail rounded ; 

 much resembles the flounder ; but the smooth lateral 



