[37]

A similar shrinkage takes place in the metamorphosis of the larva (Leptocephalus) of Eels, as has been shown by Grassi, Quart. J. Micr. Sci. xxxix. 1897, p. 374.

[38]

Schimkewitsch, Zool. Anz. xi. 1888, p. 283; Morgan, J. Morphol. ix. 1894, p. 60; Punnett (op. cit. p. 661) believes that they are ectodermal.

[39]

Allman's name (Quart. J. Micr. Sci. ix. 1869, p. 57 f.) replaces that given by Sars, because the latter gave no description by which the organism could be recognised.

[40]

"Remarkable forms of Animal Life," i. Christiania Univ.-Program for the first half-year, 1869; and Quart. J. Micr. Sci. xiv. 1874, p. 23.

[41]

Quart. J. Micr. Sci. xxiv. 1884, p. 622.