Pelodytes, [134]

Penis, of Leptoplana, [14], [15];

of Polyclads, [27];

of Planaria, [38], [39];

of Rhabdocoelida, [47];

of Temnocephala, [54];

of Calliobothrium, [75];

of Schistocephalus (cirrus-sac), [86]

Pennant, on Hirudinea, [406] n.

Pereyaslawzewa, on Acoela, [44] n.