[409] Archiv f. Anatomie, Physiologie, u. Wiss. Medicin. 1874.
[410] Loc. cit.
[411] Loc. cit.
[412] Loc. cit., Waldeyer, p. 23, denies the existence of this membrane for Mammalia. It certainly is not so conspicuous as in some other types, but appears to me nevertheless to be always present.
[413] My view of the structure of the ovary would seem to be that held by Götte, Entwicklungsgeschichte d. Unke, pp. 14 and 15.
[414] Loc. cit. 36.
[415] Since writing the above I have made out that in the Reptilia the formation of the permanent ova takes place in the same fashion as in Elasmobranchii and Mammalia.
[416] Entwicklungsgeschichte d. Unke.
[417] Zeit. für wiss. Zool. Bd. XXVII.
[418] Gegenbaur, loc. cit.; Waldeyer, loc. cit.; Eimer, loc. cit.; and Ludwig, loc. cit.