. On the anatomy of vertebrates [electronic resource] . ave only a cylindrical passageto the external opening. On the 8th of December Dr. Bennett dis-covered in the subterranean nest of an Orni-thorhynchus three living young, naked, not quite two inches inlength, fig. 600. On the 12th of August (1864) a femaleEchidna hystrix was captured in the hollow of a prostrate4 cotton tree, in Colac Forest, Victoria Province, Australia,having a young one, fig. 603, e, with its head buried in a mam-mary or marsupial fossa, ib. c. This young one was naked, ofa bright red colour, and one inch two lines in l
. On the anatomy of vertebrates [electronic resource] . ave only a cylindrical passageto the external opening. On the 8th of December Dr. Bennett dis-covered in the subterranean nest of an Orni-thorhynchus three living young, naked, not quite two inches inlength, fig. 600. On the 12th of August (1864) a femaleEchidna hystrix was captured in the hollow of a prostrate4 cotton tree, in Colac Forest, Victoria Province, Australia,having a young one, fig. 603, e, with its head buried in a mam-mary or marsupial fossa, ib. c. This young one was naked, ofa bright red colour, and one inch two lines in length. Betweenthe condition of the uterine ovum, as in fig. 567, and that of the(probably new-born, or recently born) young Monotremes, above-mentioned, I have not hitherto received materials for furtherelucidating the development of the foetus in this singular group ofMammals: whether cleavage of the yolk takes place prior to the 1 lxxvii. I was indebted to my old friend and fellow-student, George Bennett,now , for the above mentioned ortion ot the vitelline mem-brane and germinal stratum,Oriiitliorhynchus. lXxvii. 718 ANATOMY OF VERTEBRATES. entry of the ovum into the uterus still remains a matter forobservation. The young of both Ornithorhynchus and Echidnawill be described in the chapter on the Mammary organs. § 400. Development of Marsupialia.—On the 27th of August(1833), a female Kangaroo (Macropns major), captive in theGardens of the London Zoological Society, received the stood with her fore-paws off the ground; the male mounted,more canino, embracing her neck with his fore-paws, and retainedhis hold during a full quarter of an hour: during this period thecoitus was repeated three times, and on the second occasion muchfluid escaped from the vulva. The male was removed from thefemale in the evening of the same day, and was not afterwardsadmitted to her. On September the 2nd, six days after thecoitus, I examined the pouch of the female ; and t
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