Note 141 — Chapter XIII
Reading edition
Vide Vol. II. pp. 179 and 191. In this connection attention may be called to Cœloplana Metschnikowii, a form described by Kowalevsky, Zoologischer Anzeiger, No. 52, p. 140, as being intermediate between the Ctenophora and the Turbellaria. As already mentioned, there does not appear to me to be sufficient evidence to prove that this form is not merely a creeping Ctenophor.