[119] Loc. cit.
[120] Loc. cit.
[121] Loc. cit.
[122] Qy. Journal of Micros. Science, Oct. 1874. [This Edition, No. V.]
[123] Loc. cit. Probably Dr Schultz, here as in other cases, has mistaken nuclei for cells.
[124] Loc. cit.
[125] Prof. Haeckel (“Die Gastrula u. die Eifurchung d. Thiere,” Jenaische Zeitschrift, Vol. IX.) has unfortunately copied a figure from my preliminary paper (loc. cit.) (repeated now), which I had carefully avoided using for the purpose of describing the formation of the layers on account of the epiblast cells in the original having been much altered by the chromic acid, as a result of which the whole section gives a somewhat erroneous impression of the condition of the blastoderm at this stage. I take this opportunity of pointing out that the colouration employed by Professor Haeckel to distinguish the layers in this section is not founded on my statements, but is, on the contrary, in entire opposition to them. From the section as represented by Professor Haeckel it might be gathered that I considered the lower layer cells to be divided into two parts, one derived from the epiblast, while the other constituted the hypoblast. Not only is no such division present at this period, but no part of the lower layer cells, or the mesoblast cells into which they become converted, can in any sense whatever be said to be derived from the epiblast.
[126] “Entwicklungsgeschichte der Najaden,” Sitz. d. k. Akad. Wien, 1875.
[127] Morphologische Jahrbuch, Vol. 1. Heft 3.
[128] “Développement des Mammifères,” Bul. de l'Acad. de Belgique, XL. No. 12, 1875.