This was a picture on page 82. The caption for the picture was: Fig. 22.--Drawing of the cerebral hemispheres of a Man, and of a Chimpanzee of the same length. in order to show the relative proportions of the parts: the former taken from a specimen, which Mr. Flower, Conservator of the Museum of the Royal College of Surgeons, was good enough to dissect for me; the latter, from the photograph of a similarly dissected Chimpanzee's brain, given in Mr. Marshall's paper above referred to. a. posterior lobe; b, lateral ventricle; c, posterior cornu; x, the hippocampus minor