(161) H. Dutrochet. “Recherches s. l. enveloppes du fœtus.” Phil. Trans., Paris, Vol. VIII. 1816.
(162) W. K. Parker. “On the skull of the common Snake.” Phil. Trans., Vol. 169, Part II. 1878.
(163) H. Rathke. Entwick. d. Natter. Königsberg, 1839.

Chelonia.

(164) "L. Agassiz. Contributions to the Natural History of the United States, Vol. II. 1857. Embryology of the Turtle.
(165) W. K. Parker. “On the development of the skull and nerves in the green Turtle.” Proc. of the Roy. Soc., Vol. XXVIII. 1879. Vide also Nature, April 14, 1879, and Challenger Reports, Vol. I. 1880.
(166) H. Rathke. Ueb. d. Entwicklung d. Schildkröten. Braunschweig, 1848.

Crocodilia.

(167) H. Rathke. Ueber die Entwicklung d. Krokodile. Braunschweig, 1866.

Mammalia

(168) K. E. von Baer. Ueb. Entwicklungsgeschichte d. Thiere. Königsberg, 1828-1837.
(169) Barry. “Researches on Embryology.” First Series. Philosophical Transactions, 1838, Part II. Second Series, Ibid. 1839, Part II. Third Series, Ibid. 1840.
(170) Ed. van Beneden. La maturation de l'œuf, la fécondation et les premières phases du développement embryonaire d. Mammifères. Bruxelles, 1875.
(171) Ed. van Beneden. “Recherches sur l'embryologie des Mammifères.” Archives de Biologie, Vol. I. 1880.
(172) Ed. v. Beneden and Ch. Julin. “Observations sur la maturation etc. de l'œuf chez les Cheiroptères.” Archives de Biologie, Vol. I. 1880.
(173) Th. L. W. Bischoff. Entwicklungsgeschichte d. Säugethiere u. des Menschen. Leipzig, 1842.
(174) Th. L. W. Bischoff. Entwicklungsgeschichte des Kanincheneies. Braunschweig, 1842.
(175) Th. L. W. Bischoff. Entwicklungsgeschichte des Hundeeies. Braunschweig, 1845.
(176) Th. L. W. Bischoff. Entwicklungsgeschichte des Meerschweinchens. Giessen, 1852.
(177) Th. L. W. Bischoff. Entwicklungsgeschichte des Rehes. Giessen, 1854.
(178) Th. L. W. Bischoff. “Neue Beobachtungen z. Entwicklungsgesch. des Meerschweinchens.” Abh. d. bayr. Akad., Cl. II. Vol. X. 1866.
(179) Th. L. W. Bischoff. Historisch-kritische Bemerkungen z. d. neuesten Mittheilungen üb. d. erste Entwick. d. Säugethiereier. München, 1877.
(180) M. Coste. Embryogénie comparée. Paris, 1837.
(181) E. Haeckel. Anthropogenie, Entwicklungsgeschichte des Menschen. Leipzig, 1874.
(182) V. Hensen. “Beobachtungen üb. d. Befrucht. u. Entwick. d. Kaninchens u. Meerschweinchens.” Zeit. f. Anat. u. Entwick., Vol. I. 1876.
(183) A. Kölliker. Entwicklungsgeschichte d. Menschen u. d. höheren Thiere. Leipzig, 1879.
(184) A. Kölliker. “Die Entwick. d. Keimblätter des Kaninchens.” Zoologischer Anzeiger, Nos. 61, 62, Vol. III. 1880.
(185) N. Lieberkühn. Ueber d. Keimblätter d. Säugethiere. Doctor-Jubelfeier d. Herrn. H. Nasse. Marburg, 1879.
(186) N. Lieberkühn. “Z. Lehre von d. Keimblättern d. Säugethiere.” Sitz. d. Gesell. z. Beförd d. gesam. Naturwiss. Marburg, No. 3. 1880.
(187) Rauber. “Die erste Entwicklung d. Kaninchens.” Sitzungsber. d. naturfor. Gesell. z. Leipzig. 1875.
(188) C. B. Reichert. “Entwicklung des Meerschweinchens.” Abh. der. Berl. Akad. 1862.
(189) E. A. Schäfer. “Description of a Mammalian ovum in an early condition of development.” Proc. Roy. Soc., No. [168]. 1876.
(190) E. A. Schäfer. “A contribution to the history of development of the guinea-pig.” Journal of Anat. and Phys., Vol. X. and XI. 1876 and 1877.

Fœtal Membranes and Placenta of Mammalia.

(191) John Anderson. Anatomical and Zoological Researches in Western Yunnan. London, 1878.
(192) K. E. von Baer. Untersuchungen über die Gefässverbindung zwischen Mutter und Frucht, 1828.
(193) C. G. Carus. Tabulae anatomiam comparativam illustrantes. 1831, 1840.
(194) H. C. Chapman. “The placenta and generative apparatus of the Elephant.” Journ. Acad. Nat. Sc., Philadelphia. Vol. VIII. 1880.
(195) C. Creighton. “On the formation of the placenta in the guinea-pig.” Journal of Anat. and Phys., Vol. XII. 1878.
(196) Ecker. Icones Physiologicae. 1852-1859.
(197) G. B. Ercolani. The utricular glands of the uterus, etc., translated from the Italian under the direction of H. O. Marcy. Boston, 1880. Contains translations of memoirs published in the Mem. dell'Accad. d. Scienze d. Bologna, and additional matter written specially for the translation.
(198) G. B. Ercolani. Nuove ricerche sulla placenta nei pesci cartilaginosi e nei mammiferi. Bologna, 1880.
(199) Eschricht. De organis quae respirationi et nutritioni fœtus Mammalium inserviunt. Hafniae, 1837.
(200) A. H. Garrod and W. Turner. “The gravid uterus and placenta of Hyomoschus aquaticus.” Proc. Zool. Soc., London, 1878.
(201) P. Harting. Het ei en de placenta van Halicore Dugong. Inaug. diss. Utrecht. “On the ovum and placenta of the Dugong.” Abstract by Prof. Turner. Journal of Anat. and Phys., Vol. XIII.
(202) [a/](202) Th. H. Huxley. The Elements of Comparative Anatomy. London, 1864.
(203) A. Kölliker. “Ueber die Placenta der Gattung Tragulus.” Verh. der Würzb. phys.-med. Gesellschaft, Bd. X.
(204) C. D. Meigs. “On the reproduction of the Opossum (Didelphis Virginiana).” Amer. Phil. Soc. Trans., Vol. X. 1853.
(205) H. Milne-Edwards. “Sur la Classification Naturelle.” Ann. Sciences Nat., Sér. 3, Vol. I. 1844.
(206) Alf. Milne-Edwards. “Recherches sur la famille des Chevrotains.” Ann. des Sciences Nat., Séries V., Vol. II. 1864.
(207) Alf. Milne-Edwards. “Observations sur quelques points de l'Embryologie des Lemuriens, etc.” Ann. Sci. Nat., Sér. V., Vol. XV. 1872.
(208) Alf. Milne-Edwards. “Sur la conformation du placenta chez le Tamandua.” Ann. des Sci. Nat., XV. 1872.
(209) Alf. Milne-Edwards. “Recherches s. l. enveloppes fœtales du Tatou à neuf bandes.” Ann. Sci. Nat., Sér. VI., Vol. VIII. 1878.
(210) R. Owen. “On the generation of Marsupial animals, with a description of the impregnated uterus of the Kangaroo.” Phil. Trans., 1834.
(211) R. Owen. “Description of the membranes of the uterine fœtus of the Kangaroo.” Mag. Nat. Hist., Vol. I. 1837.
(212) R. Owen. “On the existence of an Allantois in a fœtal Kangaroo (Macropus major).” Zool. Soc. Proc., v. 1837.
(213) R. Owen. “Description of the fœtal membranes and placenta of the Elephant.” Phil. Trans., 1857.
(214) R. Owen. On the Anatomy of Vertebrates, Vol. III. London, 1868.
(215) G. Rolleston. “Placental structure of the Tenrec, etc.” Transactions of the Zoological Society, Vol. V. 1866.
(216) W. Turner. “Observations on the structure of the human placenta.” Journal of Anat. and Phys., Vol. VII. 1868.
(217) W. Turner. “On the placentation of the Cetacea.” Trans. Roy. Soc. Edinb., Vol. XXVI. 1872.
(218) W. Turner. “On the placentation of Sloths (Cholœpus Hoffmanni).” Trans. of R. Society of Edinburgh, Vol. XXVII. 1875.
(219) W. Turner. “On the placentation of Seals (Halichœrus gryphus).” Trans. of R. Society of Edinburgh, Vol. XXVII. 1875.
(220) W. Turner. “On the placentation of the Cape Ant-eater (Orycteropus capensis).” Journal of Anat. and Phys., Vol. X. 1876.
(221) W. Turner. Lectures on the Anatomy of the Placenta. First Series. Edinburgh, 1876.
(222) W. Turner. “Some general observations on the placenta, with special reference to the theory of Evolution.” Journal of Anat. and Phys., Vol. XI. 1877.
(223) W. Turner. “On the placentation of the Lemurs.” Phil. Trans., Vol. 166, p. 2. 1877.
(224) W. Turner. “On the placentation of Apes.” Phil. Trans., 1878.
(225) W. Turner. “The cotyledonary and diffused placenta of the Mexican deer (Cervus Americanus).” Journal of Anat. and Phys., Vol. XIII. 1879.

Human Embryo.