RAPPORTS. XIII C 1 et 3, Appendice — 6 — EGGS OF FISHES 



III. Egg bathypelagic with colourless or faintly rose-coloured oil- 

 globule, usually flattened and rarely divided. 



Diameter of egg : 3 to 3.5. Oil-globule: 0.95—1.16. Spawning- 

 time: II-IX. 



Skager Rak, Atlantic. Argentina silus Asc. 



B. Yolk homogenous without segmentation. 



1. Eggs enveloped in a common mucous mass, from which however they often 

 apparently become isolated. 



a. Eggs polygonal, flattened against one another, with large perivitelline space. 



Diameter of egg: 2.13 to 2.36. Oil-globule: 0.53—0.57, usually yellow; 

 embryonic pigment very dark. Spawning-time: VI to VIII. 

 North Sea, Skager Rak, Channel, Atlantic. Lophius piscatorius L. 



b. Eggs ellipsoidal with yellowish oil-globule of 0.18 — 0.20. 



Diameter of egg: 0.90 by 0.75. Spawning-time: VII— IX. 



Mediterranean, Atlantic? *Fierasfer dentatus Cuv. 



2. Eggs isolated, not enveloped in a mucous mass. 



§. Oil-globule relatively large, nearer one-fourth than one-fifth of the diameter 

 of the egg. 



a. Small egg of 0.94 to 1.03 with oil-globule 0.25 to 0.28 ; embryonic pigment 

 black and yellow. Gadoid anus. Spawning-time : VII — IX (earlier in the 

 Mediterranean and off the Atlantic coasts of South Europe, beginning in II). 



Skager Rak, Atlantic. *Merlucms merluccius L. 



b. Small egg of 0.97 to 1.13 (IV: 1.06) with oil-globule 0.28 to 0.31, i.e. 

 about */i5 of the diameter of the egg. Oil usually yellowish or greenish. 

 Embryonic pigment black and bright-yellow. Gadoid anus. Spawning- 

 time: m to VI. 



North Sea, Atlantic. Lota inolva L. 



c. Egg of medium size, 1.07 to 1.22, with oil-globule 0.25—0.30, usually about 

 one-fourth of the diameter of the egg. Only black pigment on the embryo, 

 the yolk without pigment. Pleuronectid anus. Spawning-time: III to V. 



Northern North Sea, west coast of Britain. 



* Lepidorhombus whiff Walb. 



d. Egg of medium size, 0.97 to 1.38 (VI; 1,19, VII: 1.10), with oil-globule 

 0.25 to 0.35, usually about one-fourth of the diameter of the egg; late 

 embryonic stages with moss-green pigment ; yolk without pigment. Anus 

 immediately behind the yolk-sac. Spawning-time: V to VIII. 



North Sea, Channel, Atlantic. Scomber scotnbrus L. 



e. Larger eggs of 1.10 to I.60 (IV: 1.52, V: 1.42, VI: 1.28, VII: 1.23), 

 with oil-globule 0.19 to O.33, usually somewhat less than one-fourth 

 and about one-fifth of the diameter of the egg. Embryonic pigment 

 black and yellow, appearing early also on the yolk ; pectoral fins of the 

 embryo very evident; anus close behind the yolk-sac. Spawning-time: 

 IV to VUI. 



North Sea, Channel, Atlantic. Trigla gurnardus L. and similarly 

 other Trigla species, especially Trigla lucerna L. 



