[180]

The spiral ridge figured by Hertwig (Fig. 61, 1. c) is probably an incorrect representation of this structure, exceedingly minute in all genera but Choanophrya.

[181]

In Choanophrya I have failed to find any pore, and believe the bud-formation to be strictly endogenous.

[182]

See Quart. Journ. Micr. Sc. xlv. 1902, p. 325.

[183]

In Journ. Coll. Sc. Japan, x. 1896.

[184]

Étude monographique sur le groupe des Tentaculifères, Ann. Soc. Belge Micr. xxiv.-xxvi. 1901.