R Reindeer N --------------------------------------------------------------------------- A 2d Inter- 8 200,000 375,000 Heidelberg African and Asiatic R glacial Race Animals, Ele- Y Mindel-Riss phant, Hippo- potamus ----------------------------------------------------------------------------- 2d Glacial 1 25,000 400,000 Cold weather Mindel animals ----------------------------------------------------------------------------- 1st Inter- 3 75,000 475,000 Pithecan- Hippopotamus, glacial thropus Elephant, Afri- Erectus can and Asiatic plants ----------------------------------------------------------------------------- 1st Glacial 1 25,000 500,000 ============================================================================= T E R T I A R Y ----------------------------------------------------------------------------- ====================================================================== _Prehistoric Types of the Human Race_.--The earliest record of human life yet discovered is the _Pithecanthropus Erectus_ (Trinil), the apelike man who walked upright, found in Java by Du Bois, about the year 1892. Enough of the skeletal remains of human beings were found at this time to indicate a man of rather crude form and low brain capacity (about 885 c.c.), with possible powers of speech but with no probably developed language or no assumption of the acquaintance with the arts of life.[4] The remains of this man associated with the remains of one other skeleton, probably a woman, and with the bones of extinct animals, were found in a geological stratum which indicates his age at about 500,000 years. Professor McGregor, after a careful anatomical study, has reproduced the head and bust of Pithecanthropus, which helps us to visualize this primitive species as of rather low cultural type. The low forehead, massive jaw, and receding chin give us a vision of an undeveloped species of the human race, in some respects not much above the anthropoid apes, yet in other characters distinctly human.