RAPPORTS. XIII C 1 et 3, Appendice — 8 — EGGS OF FISHES 



§§. Oil-globule not so large, about one-fifth of the diameter of the ' egg. 



a. Small eggs of 0.66 to 0.98 with oil-globule 0.12 to 0.19. Gadoid anus. 



1. Oil-globule often of a faint greenish, yellowish or reddish tint, 

 chorion almost always with attached air-capsule ; only black pigment 

 on embryo, none on yolk. 



a. Pigment in 3 zones on the postanal portion of the body. 



Spawning-time: I to VI (II: 0.86, III: 0.82, IV: 0.79, V: 0.76). 



Coastal waters. North European coasts. Onos mustela L. 



ß. Pigment in 2 zones on the postanal portion of the body. 

 Spawning-time: II to VIII. (Ill: 0.90, IV: 0.87, V: 0.83, VI: 0.76). 

 Open Sea, North Sea, Skager Rak, Atlantic coasts. 



Onos ciinbrius L. 



2. Oil-globule colourless, chorion without air-capsule, embryonic 

 pigment black and yellow, also on the yolk. 



Diameter of egg : 0.75 to O.91 (VI: 0.85, VIII: 0.83). Oil-globule: 

 0.14 to 0.19. Spawning-time: V to IX. 

 Alga region of coastal waters, coasts of North- West Europe. 



Raniceps raninus L. 



b. Medium-sized egg of O.94 to l.ll, with oil-globule 0.19 to 0.23 at 

 the front end of the yolk-sac. Only black pigment, the yolk without 

 pigment. Anus immediately behind the yolk-sac. Spawning - time : 

 VI to VIII. 



Southern North Sea. *Trachinus draco L. 



c. Large egg of 1.26 to 1.52 (IV: 1.403, V: 1.365), oil-globule 0.23 to 

 0.32, usually red. Pigment black, none on yolk, a greenish shimmer 

 on the front part of the body and on the tip of the tail towards the 

 end of the embryonic period. Gadoid anus. Spawning-time : IV to VI. 



Northern North Sea, North Atlantic. Brosmnis bvosme Asc. 



§§§. Oil-globule usually less than one-fifth of the diameter of thé egg, about 

 one-sixth and less. 



a. Eggs extremely small, 0.60 to O.76, with oil-globule o.ll to O.13. 

 Pigment rust-coloured, no black. Pleuronectid anus. 



a. Pigment collected into one postanal group. Spawning-time: VI to 

 VIII (VI: 0.70, VIII: 0.65). 



Southern North Sea, Channel, Atlantic. 



Arnoglossus laterna Walb. 

 /?. Pigment arranged in two postanal groups. Spawning-time: VII. 

 Channel, Atlantic, Southern North Sea (?). 



* Arnoglossus grohmanni Bp. 



b. Diameter of egg o.go to l.Ol. Oil-globule 0.15— 0.17, often yellowish. 

 Pigment black and golden-yellow, no pigment on yolk. Anus behind 

 the middle of the body. Spawning-time: VI to VIII. 



Channel. * Capros aper Lacep. 



c. Diameter of egg 0.72 to O.98 (IV: 0.92?, VI: 0.80?). Oil-globule 

 0.09 to 0.16, becoming smaller during development. Pigment delicate, 



