PLATE IV. 



Fig. 1. Egg of Brill, Botkus rhombus, irregular segmentation. May 24, 

 1892. W. C. M. 



2. „ „ ditto. May 25, 1892. W. C. M. 



3. „ „ ditto. May 27, 1892. W. C. M. 



4. ,, „ Sail-fluke, Lepidorhomhus whiff. W. C. M. 



5. ,, „ Topknot, Zeugopterus sp. July 9, 1891. W. C. M. 



6. „ „ Topknot, Z. punctatiis, unfertilised. W. C. M. 



7. ,, „ Topknot-like form, advanced. E. E. Prince. 



8. „ „ Sole, Solea vulgaris, from above (floating). W. C. M. 



9. ,, „ ditto, lateral view. W. C. M. 



10. „ „ ditto, later stage (pigmented yolk). W. C. M. 



11. ,, „ Soleuette, Solea lutea. July 11, 1890 (early stage). 



W. 0. M. 



12. Egg of Variegated Sole, Solea variegata (embryo outlined). 



July 13, 1890. J. T. Cunningham. 



13. Egg resembling that of Solenette, numerous minute oil-globules. 



April 10, 1892. W. C. M. 



14. Egg of Plaice, Pleuronectes platessa, with advanced embryo. 



April 20, 1886. E. E. Prince. 



15. Egg of Lemon Dab, P. microcephaliis, late stage. July 15, 



1890. (The colour here is diagrammatic.) W. C. M. 



16. Capsule of egg of ditto, showing cross-ridges. W. C. M. 



17. Portion of capsule of egg of ditto, highly magnified. W. C. M. 



18. Egg of Dab, P. limanda. E. E. Prince. 



19. „ „ Sprat, Clupea sprattus. E. E. Prince. 



20. Egg hke that of Dab. June 11, 1892. W. C. M. 



21. Egg of Anchovy. F. Raffaele. 



22. „ „ ditto, advanced. P. Eafifaele. 



23. „ „ Pilchard, Clupea pilchardus. F. Kaflfaele. 



24. „ „ Herring, Clupea harengus (first furrow). C. Kupfier. 



