RAPPORTS. XIII C 1 et 3, Appendice — lO — EGGS OF FISHES 



black and bright -yellow, also on the yolk. Pleuronectid anus. 

 Spawning-time: IV to VIII. 



North Sea, British and Norwegian coasts. 



Scophthalmus norvégiens Gthr. 



d. Diameter of egg o.go to O.99, oil-globule 0.16 to O.18. Pigment deli- 

 cate, black and yellow, also on the yolk. Pleuronectid anus. Spawn- 

 ing-time: VI. 



Channel and S.W. of Great Britain (?). 



* Scophthalmus tmimaculatus Risso. 



e. Diameter of egg 0.92 to I.07 (II, III: 1.03, IV, V: 0.98), oil-globule 

 0.17 to 0.20. Pigment black and chrome-yellow, also on the yolk 

 and oil-globule. Pleuronectid anus. Spawning-time: II to VI. 



British and Scandinavian coasts. Northern North Sea. 



Zeugopterus punctatus Bloch. 



f. Diameter of egg 0.9 1 to I.195 (VI: 1.03, VII: 0.99), oil-globule 0.15 

 to 0.22. Pigment black and rusty red, not on the yolk-sac but 

 spreading out on the fins. Pleuronectid anus. Spawning-time : IV to VIII. 



North Sea, Channel. Rhombus mMxtmus L. 



g. Diameter of egg 1.16 to 1.51 (V: 1.39, VI: 1.29). Oil-globule 0.16 



to 0.25. Pigment very bright, black, yellow and red, also on the 



yolk-sac and the fins. Pleuronectid anus. Spawning-time: III to VIII. 



North Sea, Channel, Kattegat. Rhombus laevis Rondel. 



B. Eggs without oil-globules. 



I. Egg oval, 1.3 to 1.9 in the long, 0.7 to 1.2 in the short diameter of the ellipsoid, 

 the largest occurring in brackish water (Zuidersee, V: 1.60 by 0.92, VII: 1.37 by 

 0.83). Yolk segmented, pigment wanting; notochord for the most part unicolumnar. 

 Clupeid anus. Spawning-time: V to VII. 



Southern North Sea, West European coasts. Engraulis encrasicholus L. 



II. Egg round. 



A. Egg-capsule with honeycomb-like reticulations. Cortex of the yolk segmented. 

 Pigment predominantly yellowish and black, very delicate. Diameter of egg 0.69 

 to 0.94 (V: 0.845, VI: 0.78). Anus a short distance behind the yolk. Spawning- 

 time: III— VIII (in the Channel, already in February). 



North Sea, West European coasts, Channel. Ca/h'onymus lyra L. 



B. Egg- capsule smooth. 



1. Egg with very large perivitelline space. Diameter of egg very considerable 

 and very variable 1.38 to 3.5 (North Sea, III: 2.015, IV: 1.97). Pigment yellow 

 and black. Pleuronectid anus. Spawning-time; I to V. 



Kattegat, North Sea, Atlantic, Polar Sea. Drepanopsetta platessoides Fabr. 



2. Egg without large perivitelline space. 



(if, Yolk of egg segmented, diameter of egg 0,82 to 1.23 (III: 1.07, V: 0.97, 



