Note 260 — Chapter VIII

Stammesverwandtschaft d. Wirbelthiere u. Wirbellosen and Die Verwandtschaftsbeziehungen d. gegliederten Thiere. This latter work, for a copy of which I return my best thanks to the author, came into my hands after what follows was written, and I much regret only to have been able to make one or two passing allusions to it. The work is a most important contribution to the questions about to be discussed, and contains a great deal that is very suggestive; some of the conclusions with reference to the Nervous System appear to me however to be directly opposed to the observations on Spinal Nerves above recorded.