The works of Francis Maitland Balfour, Volume 2 (of 4) : $b A treatise on comparative embryology: InvertebrataBalfour, Francis M. (Francis Maitland)
Science
The works of Francis Maitland Balfour, Volume 2 (of 4) : $b A treatise on comparative embryology: Invertebrata
Balfour, Francis M. (Francis Maitland)
Embryology; Zoology
(81) F. M. Balfour. "On the Phenomena accompanying the Maturation and
Impregnation of the Ovum." _Quart. J. of Micros. Science_, Vol.
XVIII., 1878.
(82) Calberla. "Befruchtungsvorgang beim Ei von Petromyzon Planeri."
_Zeit. f. wiss. Zool._, Vol. XXX.
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(84) H. Fol. "Die erste Entwickelung des Geryonideneies." _Jenaische
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(85) Idem. "Sur le Développement des Ptéropodes." _Archives de
Zoologie Expérimentale et Générale_, Vol. IV. and V., 1875-6.
(86) Idem. "Sur le Commencement de l'Hénogénie." _Archives des
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(87) Idem. _Recherches s. l. Fécondation et l. commen. d.
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(90) Idem. Ibid. _Morphologisches Jahrbuch_, Vol. III. Heft 1, 1877.
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III., 1877, Heft 3.
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IV. Heft 1 and 2, 1878.
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(96) W. Salensky. "Befruchtung u. Furchung d. Sterlets-Eies."
_Zoologischer Anzeiger_, No. 11, 1878.
(97) E. Selenka. _Befruchtung des Eies von Toxopneustes variegatus._
Leipzig, 1878.
(98) Strasburger. _Ueber Zellbildung u. Zelltheilung._ Jena, 1876.
(99) Idem. _Ueber Befruchtung u. Zelltheilung._ Jena, 1878.
(100) C. O. Whitman. "The Embryology of Clepsine." _Quart. J. of Micr.
Science_, Vol. XVIII., 1878.
CHAPTER III.
THE SEGMENTATION OF THE OVUM.
The immediate result of the fusion of the male and female pronucleus
is the segmentation or division of the ovum usually into two, four,
eight, etc. successive parts. The segmentation may be dealt with from
two points of view, viz. (1) the nature of the vital phenomena which
take place in the ovum during its occurrence, which may be described
as the internal phenomena of segmentation. (2) The external characters
of the segmentation.
_Internal Phenomena of Segmentation._
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