[309] See especially Allen, North American Pinnipedes, 1880.
[310] Murie, Trans. Zool. Soc. vii. 1894, p. 411.
[311] Cf. the Dugong, p. [336].
[312] Kükenthal, Jen. Zeitschr. xxviii. 1894, p. 76.
[313] Cunningham, "Sexual Dimorphism in the Animal Kingdom," London, 1900; see also Flower, Proc. Zool. Soc. 1881, p. 145.
[314] Journ. Ac. Sci. Philadelphia, ix. 1886, p. 175.
[315] See especially Tullberg, "Ueber das System der Nagethiere," Act. Ak. Upsala, 1899; and Alston, Proc. Zool. Soc. 1875, p. 61; and for nomenclature, Thomas, Proc. Zool. Soc. 1896, p. 1012; and Palmer, Proc. Biol. Soc. Washington; xi. 1897, p. 241.
[316] Proc. Zool. Soc. 1884, p. 252.
[317] Phil. Trans. 1850, pt. ii. p. 529.