LIST OF ILLUSTRATIONS 



FIG. PAGE 



1. Genitourinary system of a Chimpanzee. (After Tyson) . . 2 



2. Heads of young Orang-utan and Negro. (After Camper) . . 3 



3. Blumenbach's "norma verticalis" of three crania ... 5 



4. Section of cranium of aboriginal native of Australia ... 7 



5. Stereograph of Broca ......... 11 



6. Cranium of Bird. Occipital view 20 



7. Cranium of Dog. Occipital view ...... 20 



8. Shoulder girdle of a Reptile (Iguana) . . . . . . 21 



9. Shoulder girdle of a Prototherian Mammal . . . . 21 



10. Shoulder girdle of an Eutherian Mammal 22 



11. Classification of Mammalia (Gregory) 25 



12. Shoulder girdle of a Prototherian Mammal .... 27 



13. Cranium of Sarcophilus, a Metatherian Mammal ... 28 



14. Cranium of an Eutherian Mammal 29 



15. The Ancestry of Mammals in relation to Geological periods 



(Gregory) 37 



16. Table of Mammalian Descent 40 



17. General external appearance of a Lemur. (After Mitchell) . 45 



18. Cranium of Lemur varius 45 



19. Alimentary canal of a Lemur ....... 46 



20. Tarsius s})ectrum .......... 48 



21. Cranium of Cebus capucinus 49 



22. Alimentary canal of a Cercopitheeus monkey .... 49 



23. Cerebral hemisphere of Ateles variegatus 50 



24. Cerebral hemisphere of a Nasalis monkey . . ... . 51 



25. Cerebral hemisphere of a Gibbon ...... 52 



26. Cranium of Hapale jacchus ........ 53 



27. Adult male Nasalis monkey 55 



28. Cranium of Macacus monkey 55 



29. 30, 31. Adult male Gorilla 56 



32. Cranium of young Gorilla ........ 57 



33. Cranium of adult Gorilla 57 



34. Cerebral hemisphere of young Gorilla ..... 58 



