The Structure of Coryphodon

Abstract

I OBSERVE in your issue (vol. xvii. p. 340) a note by Prof. O. C. Marsh stating that I have included in the cast of the olfactory lobes of the brain of Coryphodon that of a part of the nasal cavity also. Prof. Marsh fails to point out the qualifying remarks to be found in my descriptions. In the explanation of Plate I. of the Proceedings of the American Philosophical Society, 1877, p. 620, I say, “The right bulbus of the olfactory lobe is too large above, owing to the want of preservation of the superior wall of the cavity”. In my quarto report to Lieut. G. M. Wheeler in Vol. IV. p. 223 of his Report to the Chief of Engineers, I remark, “In excavating the matrix from the Olfactory chambers some difficulty was experienced in attempting to lay bare the superior and inferior walls, &c. On one side of the bulb this boundary was probably passed through, giving a larger vertical diameter than the true one”.