Dugesia mertoni Steinmann, 1919

Planaria mertoni organization diagram along its longitudinal section.

Original figure description:

Fig. 2. Planaria mertoni. Organisationsschema im optischen Längsschnitt (nach einer Skizze von Professor Wilhelmi)

P = Pharynx, Pt = Pharynxtasche, M = Mund, D = Drüsensack, P = Penis, Gp = Genitalporus.

Original source:

http://www.biodiversitylibrary.org/item/187693#page/150/mode/1up