"The purpose of this work is to assemble and discuss the evidence of evolution contained in the brains of primates." This is the author's announcement of his program. The chief emphasis is laid on the brain stem and those parts of it that reflect changes in behavioristic adaptation to diverse modes of life. Special attention is paid to evidences of progress in the direction of human specialization during the transition from life in the treetops to life on the ground and in the open.
Is the book addressed to the lay public whose interest in problems of human evolution is still keen, or to the professional neurologists? After reading both of these ponderous volumes one is still in doubt. What one finds is apparently a technical subject matter in semipopular form. Some of us who have tried this enterprise ourselves know how difficult it is, and our own failures should