[22]. Bernard’s statement that Apus is hermaphrodite seems based on insufficient evidence.
[23]. Sayce has since described it, Proc. Roy. Soc. Victoria, xv., 1903, p. 229.
[24]. A. cancriformis had been supposed to have disappeared from the British fauna for many years, but it was found in Scotland in 1907. See R. Gurney, Nature, lxxvi., 1907, p. 589.
[25]. Branchipodides has been described by H. Woodward, from Tertiary strata.
[26]. Consult Baird, “Monograph of the Branchiopodidae,” Proc. Zool. Soc. 1852, p. 18. Packard, 12th Ann. Rep. U.S. Geol. Survey, part i., 1879.
[27]. Arch. f. Math. og Naturvidensk. xx., 1898, Nos. 4 and 6. Thiele, Zool. Jahrb. System. xiii., 1900, p. 563.
[28]. Bernard, loc. cit. p. 19; Baird, Proc. Zool. Soc. 1852, p. 1; Sayce, Proc. Roy. Soc. Victoria, xv., 1903, p. 224.
[29]. Sars, Arch. f. Math. og Naturvidensk. xx., 1898, Nos. 4 and 6.
[30]. Sars, Christiania Vidensk. Forhand. 1887. For Australian Phyllopods, see Sars, Arch. f. Math. og Naturvid. xvii., 1895, No. 7, and Sayce, loc. cit. p. 36.
[31]. Simocephalus vetulus anchors itself to weeds, etc., by a modified seta on the exopodite of the second antenna. It does not employ a dorsal organ for purposes of fixation. [G. S.]