[298] Lydekker, "Note on the Structure and Habits of the Sea-Otter (Latax lutris)," Proc. Zool. Soc. 1895, p. 421; and ibid. 1896, p. 235.
[299] See an article by Mr. Lydekker in Knowledge, April 1898, from which many of the above facts have been taken.
[300] "Preliminary Notes on the Characters and Synonymy of the different Species of Otter," Proc. Zool. Soc. 1889, p. 190.
[301] Even apparently in the same species.
[302] The number of premolars is reduced in the Polar Bear.
[303] "The Blue Bear of Thibet," etc., Proc. Zool. Soc. 1897, p. 412.
[304] Nouv. Arch. Mus. vii. 1872, Bull. p. 92; and Recherches pour servir à l'histoire naturelle des Mammifères, 1868-1874, p. 321. This genus has quite recently (Lankester, Trans. Linn. Soc. viii. 1901, p. 163) been definitely referred to the Procyonidae.
[305] For the genera of Pinnipedia see Mivart, Proc. Zool. Soc. 1885, p. 484.
[306] Murie, Trans. Zool. Soc. viii. 1874, p. 501.
[307] Bull. Amer. Mus. Nat. Hist. vi. 1894, p. 129.