[8] See Gegenbaur's Elements of Comp. Anat. Transl. by Bell, 1878, p. 421.
[9] "Über die Beziehungen zwischen Mammartasche u. Marsupium," Morph. Jahrb. xvii. 1891, p. 483.
[10] Catalogue of Marsupials in British Museum, 1886.
[11] Its independence from the epistropheus is emphasised in Monotremes and some Marsupials by its late fusion with that vertebra.
[12] Intercentra are but rarely met with anterior to the caudal series. Mr. Parsons has, however, recorded their occurrence in the lumbar vertebrae of Atherura.
[13] Tufts College Studies, No. 6, 1900.
[14] Cf. the Armadillo Peltephilus, p. 186.
[15] Gegenbaur, Vergl. Anat. Wirbelth. Leipzig, 1898, p. 404.
[16] Ehler's Zool. Miscellen, i. 1894.
[17] Proc. Zool. Soc. 1865, p. 567.