[48] This groove has been found in the existing Myrmecobius, see p. 154.
[49] Trans. New York Acad. Sci. xiii. 1894, p. 234.
[50] Gegenbaur, Zur Kenntniss der Mammarorgane der Monotremen, Leipzig, 1886.
[51] Quart. Journ. Micr. Sci. xxiv. 1884, p. 124.
[52] Beddard, Proc. Roy. Phys. Soc. Edinb. viii. 1885, p. 354.
[53] See Phil. Trans. clxxviii. 1887, where the literature of the subject is fully cited.
[54] Muscular insertions and attachments do not, however, altogether support the comparison.
[55] Journ. Anat. Phys. 1899, p. 309.
[56] Proc. Zool. Soc. 1864, p. 18.
[57] Myrmecophaga aculeata was the name given by Shaw.