[57]

Woodworth (loc. cit. p. 38) states that in Phagocata the yolk-glands arise by proliferation from two parovaria, placed just in front of the ordinary ovaries. Iijima, however (Zeitschr. f. wiss. Zool. Bd. xl. 1883, p. 454), regarded them as derivatives of the parenchyma.

[58]

The extensive literature on this subject is fairly completely summarised by Voigt in Biol. Centralblatt, vol. xiv. Nos. 20, 21, 1894. Faraday's observations (cf. p. [6], note 8) have been generally overlooked.

[59]

Archives d. Biologie, tom. xii. 1892, p. 437.

[60]

Mitth. Zool. Stat. Neapel, Bd. iii. 1882, p. 187.

[61]

Böhmig, Ergebnisse d. Plankton Expedition, Bd. ii. H. g. 1895.