The Animal Parasites of Man

by Harold Benjamin Fantham; Max Braun; J. W. W. Stephens; Fred. V. Theobald

Group Fercocercous cercariæ.

Cercariæ single (not in colonies). Tail forked at its end.

Family. Schistosomidæ.

Pharynx absent.

Cercaria bilharzia, Leiper, 1915.

Pigment spots (eyes) anterior to ventral sucker absent, cuticular keel on forks of tail absent.

In Bullinus sp. and Planorbis boissyi in Egypt, (?) in Physopsis africana, South Africa. Adult form, Schistosoma hæmatobium.

Cercaria bilharziella, Leiper, 1915.

Cuticular keel on tail forks present. Pigment spots (eyes) in front of ventral sucker present.