J. Howard Moore 
The Universal Kinship [EPUB ebook] 

It was in the zoology class at college. We had made all the long journey from amoeba to coral, from coral to worm, from worm to mollusk, from mollusk to fish, from fish to reptile, and from reptile to mammal-and there, in the closing pages of faithful old Packard, we found it. ‘A mammal of the order of primates, ‘ the book said, with that unconcern characteristic of the deliverances of science. I was almost saddened. It was the first intimation I had ever received of that trite but neglected truth that man is an animal .