Fig. 424. Ventral surface of the Leech.
a. Anterior disk. b. Posterior disk. c. Penis. d. Vaginal orifice. e. Stigmata.
This image is from _ in Pereira's Elements of Materia Medica and Therapeutics, 1854.
A herbal distance course
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.