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XVII.—On the Placentation of Halicore Dugong

Published online by Cambridge University Press:  06 July 2012

Wm. Turner
Wm. Turner
Affiliation:
Professor of Anatomy in the University of Edinburgh.
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Extract

Comparative anatomists have long desired detailed information on the placentation of the Sirenia. It is true that in 1878 Dr Paul Harting presented to the University of Utrecht a graduation thesis, in which he described the fœtal membranes and fœtus of a Dugong, which had been acquired a short time before for the Zoological Museum of that University. The specimen had been preserved for many years in spirit of wine, and had apparently been collected by a surgeon to a merchant ship. The fœtus was 27·8 centimetres (11 inches) long. The entire chorion, with the exception of the two poles and their immediate vicinity, was covered by densely packed, short and but little branched villi, and Dr Harting came to the conclusion that the placenta of the Dugong was diffuse and non-deciduate.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 35 , Issue 2 , February 1890 , pp. 641 - 662
Copyright
Copyright © Royal Society of Edinburgh 1890

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References

page 641 note * Het Ei en de Placenta van Halicore Dugong, Proefschrift, 18th February 1878. UtrechtGoogle Scholar.

page 647 note * See amongst others the Placenta of the Lemurs, in Trans. Roy. Soc. Lond., vol. 166, 1876:Google Scholar that of Orca gladiator, in Trans. Roy. Soc. Edin., vol. xxvi., 1871,Google Scholar and of the Grey Seal, Fox, and Cat in the same, vol. xxvii., 1875Google Scholar.

page 648 note * Owing to the poles of the chorion being rounded and bent each on itself, it is difficult to fix with precision the central point of the pole. The above measurements are therefore to be regarded as approximative.

page 651 note * I may refer to a detailed description of the amniotic corpuscles in my account of the Placentation of Orca gladiator, in Trans. Roy. Soc. Edin., 1871, vol. xxviGoogle Scholar.

page 653 note * See for further details my Lectures on the Comparative Anatomy of the Placenta, p. 72, Edinburgh, 1876Google Scholar.

page 655 note * Proc. Roy. Soc. Edin., May 1875; and Lectures on the Comparative Anatomy of the Placenta, p. 108, Edinburgh, 1876Google Scholar.

page 656 note * Lectures on the Comparative Anatomy of the Placenta, Edinburgh, 1876Google Scholar.

page 656 note † Trans. Roy. Soc. Land., vol. 166, 1876Google Scholar.

page 656 note ‡ Trans. Roy. Soc. Edin., vol. xxvi, 1871Google Scholar.

page 656 note § For a discussion on the physiological relations of the epithelial lining of the crypts, I may refer to the section headed “Physiological Remarks,” in my Lectures on the Comparative Anatomy of the Placenta, p. 114, Edinburgh, 1876Google Scholar.

page 657 note * Lectures on Comp. Anat. of Placenta, p. 26.

page 657 † Trans. Zoolog. Soc., vol. v., 1863Google Scholar.

page 657 note ‡ Lect. Comp. Anat. Placenta. C. Hennig has subsequently published a description of these bodies in the Pig (Sitz. der Naturf. Ges. zu Leipzig, 1877).

page 657 note § Trans. Roy. Soc. Lond., 1857Google Scholar; Anat. Vertebrates, vol. iii.

page 657 note ∥ Lect. Comp. Anat. Placenta, p. 27.

page 657 note ¶ Jour. Acad. Nat. Sci. Philad., vol. viii., 1880Google Scholar.

page 658 note * See my Lectures on the Placenta, p. 67.

page 658 note † See my description of the Placenta of the Mexican Deer, in Journal of Anatomy and Physiology, vol. xiii. p. 195, 1879Google Scholar.

page 658 note ‡ Proc. Roy. Soc. Lond., Dec. 16, 1875Google Scholar.

page 659 note * “Form and Structure of the Manatee,” Trans. Zool. Soc. Land., vol. viii., 1870Google Scholar.

page 659 note † Memoir on the “Placenta of the Elephant” (Tram. Roy. Soc. Lond., 1857)Google Scholar.

page 659 note ‡ Memoir on the “Placentation of the Sloths” (Trans. Roy. Soc. Edin., 1873, vol. xxvii.)Google Scholar; and on the “Placentation of the Lemurs,” in Trans. Roy. Soc. Lond., 1876, vol. clxviGoogle Scholar.

page 659 note § See my Lectures on the Comp. Anat. of the Placenta, p. 111.

page 659 note ∥ Mém. de l' Acad. Imp. des Sciences de St Petersb., 7th series, fasc. ii. and iii., cxii., 1869Google Scholar.