Since the appearance, in 1906, of our “Observations on the Development of Ornithorhynchus” (1) there have appeared for the most part only isolated comments upon the facts there set forth and on our interpretation of them. This is doubtless owing to the absence or the extreme rarity of such material as might serve as a reliable basis for criticism of our results.

Copyright © 1915 by the Company of Biologists Ltd.
1915
You do not currently have access to this content.