﻿137 



Explanation of the Plates I & II. 



Table I, fig. 1. 

 _ . 9 



Rhombus maximus. 



— - — 4. 



— - — 6. 



Rhombus Icevis. 



Table II, 



fig. 



9. 



Pleuronectes limamrla . 



— - 



— 



10. 



Plenronectes platessa. 



— 



— 



11. 



12. 

 13. 



Pleuronectes flesus. 



— 



— 



Pleuronectes microcephalus. 



— 



— 



14. 



Pleuronectes cynoglossus. 



— - 



— 



15. 



Zeugopterus punctatus. 



— 



— 



16. 



Zeugopterus norvegicus. 



— 



— 



17. 



Arnoglossus laterna. 



— 



— 



IS. 



Hippoglossoidesplatessoid.es. 



— 



— 



19. 



— 



— 



— 



20. 



Hippoglossus vulgaris. 



— 



— 



21. 



Hippoglosmshippoglossoides 



Bottom stage. No spines on the 

 head. 



Transition from the pelagic stage 

 to the bottom stage ; distinct tra- 

 ces of spines on the operculum, 

 a crest between the eyes, and 

 spines on the shoulders. 



Pelagic stage with a heavy spiny 

 equipment. Embryonic fin-rays 

 in the pectorals. 



Pelagic stage. Smallerthan the prece- 

 ding one. Heavy spiny equipment. 



Bottom stage. No spines at all. 



Pelagic stage. Spines on the 

 operculum. Embryonic fin-rays 

 in the pectorals. 



Pelagic stage. Smaller than the 

 preceding one. Spines on the 

 operculum. 



Pelagic stage. No spines at 

 all. 



Bottom stage 

 ingly small 



Bottom stage 

 ingly small. 



Bottom stage*). 



Younger bottom stage. 



Bottom stage. (Norway.) 



Bottom stage. (Norway.) 



Bottom stage. (Norway.) 



Bottom, stage. (Norway.) 



Bottom stage. (Norway.) 



Pelagic stage. (Norway.) 



Bottom stage. (Norway.) 



Pelagic stage. (Norway.) 



Pelagic stage. (Greenland.) 



Pectorals exceecl- 



Pectorals exeeed- 



(The pictures are all drawn by means of camera lucida). 



*) Note: Has true tin-rays in the pectorals, but these are not indicated in the figure. 



