﻿31 



than the plaice and the Pleur. fiesus. Only with respect to the Annelida 

 Pleur limanda may be charged with eating from the plaice. — In confinement 

 Pleur. limanda is far more greedy after what little animals that may be 

 offered it as food than the plaice; I never succeeded in making the latter 

 eat anything whatever in the tanks on board. — 



In contradistinction to the species of Pleuronectes, which live on lower 

 animals, the species of Rhombus are piscivorous when grown-up. 



The young Rhombus maximus, particularly, I have this year had the 

 opportunity of examining on the sand-banks off Kjerteminde and on the 

 other shores of Funen, where it was found together with the not yet one 

 year old fry of the plaice (the 0-group). — The pelagic young ones of 

 Rhombus maximus (and surely also the young Rhombus leevis) eat chiefly 

 Copepodce and such little animals, and in confinement they can easih T be 

 fed with them. — When, in the end 'of July, the fry is living on the 

 sand-banks among the fiy- of plaice c. 1 — 2 inches long, I have in the 

 stomachs of Rhombus leevis exclusively found Mysidee of which I have 

 often at this time of the year fished 1 — 2 stone in one haul with Ammo- 

 dytes-seine. — In August I have found Rhombus maximus at the same 

 places, 2 — 2 1 / i inches long, also filled with Mysis and without any sand in 

 their stomachs. 



In the end of September I found a 2 inches long Gobius in the sto- 

 mach of a Rhombus leevis which was 5 1 /. 2 inches of length, so that the young 

 Rhombus now towards winter, when the Mysidee- partly disappear, are able 

 to take the same sort of food already as the grown-up fish. 



It is characteristic that the fishes, of the genera Rhombus and Pleuronectes, 

 though they are taken in the same haul, choose quite different food, the 

 former swimming animals, the latter digging or creeping ones; only at 

 their very youngest stages they take both of them Copepodce and the like 

 little beings. — 



A Comparison between the growth of Pleuronectes platessa, 



PI. flesus, and PI. limanda, together with observations on the 



influence of the fishery on the same. 



As indicated by the curves over leaf, representing the groivth of a 

 triennial species of fish, we shall, when we examine its size-groups, now be 

 able to find 4 distinct groups (0, 1, 2, 3), now only 3, the groups 2 and 3 

 having been amalgamated. 



It is only necessary just to mention that the 0-group represents all fish 



