Note 18 — ADAM SEDGWICK, M.A., (continued 3)

While correcting the proofs of this paper I have come across a memoir of W. Müller (Ueber die Persistenz der Urniere bei Myxine Glutinosa, Jenaische Zeitschrift, Vol. VII. 1873), in which he mentions that in Myxine the upper end of the Wolffian duct communicates by numerous openings with the pleuro-peritoneal cavity; this gives to the suggestion in the text a foundation of fact.