﻿F or the stuc^y of the young fishes of the different species, our seas offer 

 an advantage before many other seas with an abundance of species, viz. that 

 it is easier to find out to which species a little young fish belongs, as we have 

 not so many among which to choose. Nevertheless, the determination is often 

 no easy matter at all ; as far as the flat-fishes ■ are concerned, however, I think 

 I have succeeded. 



Apart from the Skager Rack and the deepest parts of the northmost Catte- 

 gat we can in our little seas expect to find in greater numbers only young 

 plaice (PI. platessa), flounders (Pleur. flesus), common dabs (Pleur. limanda), tur- 

 bots (Rhombus maximus), brills (P. Icevis), and the long rough dabs (Hippoglossoid.es 

 platessoides) : in the Cattegat we may also expect the young soles (Solea vulgaris 

 & S. lutea), Arnoglossus laterna, Zeugopterus punctatus, Z. norvegicus, Z. megastoma, 

 perhaps also young Plewronectes microcephalus, Pleur. cynoglossus, and Hippoglossus 

 maximus. For the latter three, however, we may also there most likely seek in vain. 



In greater numbers I have succeeded in finding only the young of plaice, 

 flounders, common dabs, turbots, brills, and soles. 



When' I speak of » young plaice, etc.«, I do not think of the larvse 

 just developed from the eggs, which so easily may be got by hatching, but of 

 the somewhat larger young fish which generally can be got only by catching 

 them in open nature. Strange to tell, I have in open nature got but very few 

 of the just hatched young fish, partly perhaps, because they are so very deli- 

 cate that they are washed to pieces in the fishing-gear. 



As to the fry of the sole, I shall say here only that it is easily distin- 

 guished from the fry of other flat-fishes, and simply refer the reader to Cunning- 

 ham 's monograph: A treatise on the common Sole, 1890. — There is but one 

 species of the sole, Solea vulgaris, which is common in our seas, so as a rule 

 there will be no reason to take into consideration the other species that occurs 

 here. That the latter species, S. lutea,. even when it is grown-up, is very like 

 the young ones of the common sole, is. certain; among other things, however, 

 its large scales are very characteristic. 



I shall also refer those readers who might wish to get a closer knowledge 

 of the just hatched young plaice, flounder, and common dab to Cunningham's 



