[25]

Like the line of most rapid growth in a circumnutating plant-stem.

[26]

A similar body lies at the centre to which the axial filaments of the radiating pseudopodia of the Heliozoa converge, and might be termed by parity a "podoplast"; but "centrosome" is a convenient general term to include all such bodies. It is clearly of nuclear origin in Trypanosoma (Fig. 39, p. [120]).

[27]

See for development of this view W. M‘Dougall in Journ. Anal. Physiol. xxxi. 1897, pp. 410, 539. I put it forward in the first draft of this essay in 1894.

[28]

The best general account is to be found in Davenport, Experimental Morphology, 1897.

[29]

See Jennings in Woods Holl. Biol. Lect. 1899, p. 93.