The works of Francis Maitland Balfour, Volume 1 (of 4)

by Francis M. Balfour

[74] Recherches sur la Composition et la Signification de l'Œuf.

[75] “Studien in der Entwicklungsgeschichte der Najaden,” Sitz. d. k. Akad. Wien, Bd. LXXI. 1875.

[76] Hydra. Leipzig, 1872.

[77] “Die Eier von Raja quadrimaculata,” Sitz. der k. Akad. Wien, Bd. LXVIII.

[78] Agassiz, Embryology of the Star-Fish.

CHAPTER II.

The Segmentation.

I have not been fortunate enough to obtain an absolutely complete series of eggs during segmentation.

In the cases of Pristiurus and Scyllium only have I had any considerable number of eggs in this condition, though one or two eggs of Raja in which the process was not completed have come into my hands.