Thanks CL for loan of paper by J. S. Newberry ["Notes on the ancient vegetation of N. America", Am. J. Sci. 2d ser. 29 (1860): 208–18].
Mentions reviews of the Origin.
Discusses evolution of the domestic dog, especially with respect to the views of Owen, Pallas, and Isidore Geoffroy Saint-Hilaire.
Mentions W. B. Carpenter’s views on taxonomy.
Discusses hybridisation of plants and animals.
Comments on progress in human evolution.