ILLUSTRATIONS 



Models, by Professor J. H. McGregor, of the heads of prehistoric 



types of man Frontispiece 



Fig. 1. Skulls from La Chapelle-aux-Saints, representing 



Neandertal man, and Grotte des Enfants, representing 



Cro-Magnon man facing page 1 



Fig. 2. Map to illustrate the broader lines of dispersal of the 



principal races of man. After Matthew .... 6 

 Fig. 3. Pithecanthropus erectus. Skull and face .... 15 

 Fig. 4. Homo (Paleanthropus) heidelbergensis. Mandible 



compared with that of a modern European. After 



Schoetensack 17 



Fig. 5. Eoanthropus dawsoni (Piltdown man). Skull and face 21 

 Fig. 6. Skeleton of Neandertal man compared with that of 



Cro-Magnon man 25 



Fig. 7. Homo (Paleanthropus} neandertalensis. Skull and 



face 27 



Fig. 8. Homo rhodesiensis. Skull and face 29 



Fig. 9. Homo sapiens (Cro-Magnon man). Skull and face . 33 

 Fig. 10. Provisional phylogeny of man and the anthropoids . 36 



Fig. 11. Fertilization of the ovum 41 



Fig. 12. Four diagrams of early human embryos . facing page 42 

 Fig. 13. Human embryo of 1.54 mm. (von Spec). X 23. 



Dorsal view facing page 44 



Fig. 14. Human embryo of 4.2 mm., in lateral view (His). 



X15 facing page 44 



Fig. 15. Developing brain from a human embryo of 7 mm. 



facing page 46 

 Fig. 16. The pallium and cerebellum in the brains of various 



vertebrates facing page 48 



