[22]

See p. [94].

[23]

Verhandlungen d. med. Gesellschaft zu Würzburg, iv. 1854, p. 223.

[24]

Enantia spinifera Grff. Mittheil. d. Naturwiss. Verein. f. Steiermark, 1889.

[25]

The sucker of Leptoplana tremellaris probably does not correspond with that of the Cotylea.

[26]

Collingwood, Trans. Linn. Soc. 2 ser. vol. i. pt. 3, 1876, p. 83.