In this note they frankly admitted the justice of the criticisms of M. Gratiolet, quoted above, and they illustrated, by new and careful figures, the posterior lobe, the posterior cornu, and the hippocampus minor of the Orang. Furthermore, having demonstrated the parts, at one of the sittings of the Academy, they add, "la presence des parties contestees y a ete universellement reconnue par les anatomistes presents a la seance. Le seul doute qui soit reste se rapporte au pes Hippocampi minor...A l'etat frais l'indice du petit pied d'Hippocampe etait plus prononce que maintenant." Professor Owen repeated his erroneous assertions at the meeting of the British Association in 1861, and again, without any obvious necessity, and without adducing a single new fact or new argument, or being able in any way to meet the crushing evidence from original dissections of numerous Apes' brains, which had in the meanwhile been brought forward by Prof. Rolleston,* ([Footnote] *On the Affinities of the Brain of the Orang. 'Nat. Hist. Review', April, 1861.) F.R.S., Mr. Marshall,* ([Footnote] *On the Brain of a young Chimpanzee. 'Ibid.', July, 1861.) F.R.S., Mr. Flower,* ([Footnote] *On the Posterior lobes of the Cerebrum of the Quadrumana. 'Philosophical Transactions', 1862.) Mr. Turner,* ([Footnote] *On the anatomical Relations of the Surfaces of the Tentorium to the Cerebrum and Cerebellum in Man and the lower Mammals. 'Proceedings of the Royal Society of Edinburgh', March, 1862.) and myself,* ([Footnote] *On the Brain of Ateles. 'Proceedings of Zoological Society', 1861.) revived the subject at the Cambridge meeting of the same body in 1862. Not content with the tolerably vigorous repudiation which these unprecedented proceedings met with in Section D, Professor Owen sanctioned the publication of a version of his own statements, accompanied by a strange misrepresentation of mine (as may be seen by comparison of the 'Times' report of the discussion), in the 'Medical Times' for October 11th, 1862. I subjoin the conclusion of my reply in the same journal for October 25th. "If this were a question of opinion, or a question of interpretation of parts or of terms,--were it even a question of observation in which the testimony of my own senses alone was pitted against that of another person, I should adopt a very different tone in discussing this matter. I should, in all humility, admit the likelihood of having myself erred in judgment, failed in knowledge, or been blinded by prejudice.