XIV.—On the Placentation of the Seals*

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doi:10.1017/S0080456800025989

XIV.—On the Placentation of the Seals*

Published online by Cambridge University Press: 17 January 2013

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Observations on the form of the Placenta and on the arrangement of the Fœtal membranes in the Seals have been recorded by more than one anatomist. Alessandrini of Bologna obtained a specimen of the Monk Seal (Phoca bicolor) Monachus albiventer, in the gravid condition, in which the uterus contained a single fœtus.

Type: Research Article
Information: Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 27 , Issue 3 , 1875 , pp. 275 - 304

DOI: https://doi.org/10.1017/S0080456800025989 [Opens in a new window]
Copyright: Copyright © Royal Society of Edinburgh 1875

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References

^{page 275 note †} Opusc. Scientif. vol. iii. 1819, and Meckel’s Archiv. vol. v. p. 604.

^{page 275 note ‡} Zur Anatomie der Seehunde. Nova Acta Caes. Leop. Akademie XV. 1825.

^{page 275 note §} De Organis, &c, p. 19. Hafniæ, 1837.

^{page 275 note ║} Zootomische Bemerkungen. Breslau, 1851.

^{page 276 note *} Analecten für Vergleichenden Anatomie, Zweite Sammlung, p. 55. Bonn, 1839.

^{page 276 note †} Sir Everard Home (“Comparative Anatomy,” v. p. 27), refers to a placenta of a seal which had come under his observation, and in vol. vi. plates 26 and 63, gives some figures of the organ. The figures show the villous structure; but they are especially intended by the author to illustrate the “ nerves.” Professor Owen (“ Comparative Anatomy,” iii. p. 745), says that in the seals the placenta is zonular in four or five continuous or connected divisions. In Phoca vitulina the diameter of the placental zone, parallel with the long axis of the ovum, is between 2 and 3 inches.

^{page 280 note *} The birth in the Zoological Gardens of the young seal to which this placenta belonged, is recorded by Mr A. D. Bartlett in the Proceedings of the Zoological Society of London, June 11,1868. In his description it is named Phoca fœtida, but I believe that the species was vitulina, as stated in the text.

^{page 281 note *} The capture of this specimen is recorded in the “Journal of Anatomy and Physiology,” vol. iv. 1870.Google Scholar

^{page 288 note *} Förhand. vid de Skandin. Naturforsk. i Stockholm, July 1842. Abstract by Hannover in Müller’s Archiv, p. 38, 1844. I am indebted to Sir James Paget for this reference.

^{page 290 note *} Baly’s Translation of Müller’s Physiology, note p. 1576.

^{page 290 note †} Entwicklungs-geschichte des Hunde Eies, 1845

^{page 292 note *} Mem. dell Acad. delle Scienze di Bologna, 1870. Plates 2, 3, 4.

^{page 292 note †} See my Memoir in Trans. Roy. Soc. Edinburgh, 1871.

^{page 294 note *} De Organis, &c., pp. 14, 18.

^{page 296 note *} Trans. Zool. Soc. v. 1863.Google Scholar

^{page 296 note †} Baly’s Translation of Müller’s Physiology, note, p. 1576.

^{page 286 note ‡} Memoire sur les Glandes Utriculaires de l’Uterus, p. 22. French Translation. Algiers, 1869.

^{page 299 note *} Trans. Roy. Soc. Edin. 1871, p. 426.

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XIV.—On the Placentation of the Seals*

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