LIST OF ILLUSTRATIONS 



Figure Pace 



1. Brains of lower vertebrates compared with the human brain 4 



2. Brains of mammals compared with the human brain 5 



3. Brains of apes compared with the human brain 6 



4. Comparison of slceletal structures, from fish to man 8, 9 



5. Lemur group in Madagascan habitat 25 



6. 7. Two views of Lemur mongoz 27 



8-1 1. Hand and foot of Lemur mongoz. . 30, 31 



12-15. Hand and foot of Lemur potto 32, 33 



16. Dorsal surface of brain, Lemur mongoz 34 



17. Base of brain, Lemur mongoz 35 



18. Left lateral surface of brain. Lemur mongoz 36 



19. Right lateral surface of brain. Lemur mongoz 37 



20. Ventral surface of brain stem. Lemur mongoz 38 



21. Dorsal surface of brain stem. Lemur mongoz 39 



22. Lemur mongoz. Level of the pyramidal decussation 42 



23. Lemur mongoz. Level of caudal extremity of inferior olive 46 



24,25. Lemur mongoz. Level through middle of inferior olive 48,49 



26. Lemur mongoz. Level of the vestibular complex 50 



27. Lemur mongoz. Level of the cerebellar nuclei 52 



28. Lemur mongoz. Level of emergent fibers of sixth nerve 55 



29. Lemur mongoz. Level of caudal extremity of pons Varolii 57 



30. Lemur mongoz. Level of the middle of the pons Varolii 60 



31. Lemur mongoz. Level of emergence of trochlear nerve 61 



32. Lemur mongoz. Level of the inferior colliculus 62 



33. Lemur mongoz. Level of the superior colliculus 66 



34. Lemur mongoz. Level of the optic chiasm 69 



35. Lemur mongoz. Level of the anterior commissure 70 



36. Ventral surface of gray matter of brain stem. Lemur mongoz (color) 75 



37. Dorsal surface of gray matter of brain stem. Lemur mongoz (color) 77 



38. Lateral surface of gray matter of brain stem. Lemur mongoz (color) 79 



39. 40. Two views of Tarsius spectrum 86 



41-44. Hand and foot of Tarsius spectrum 88, 89 



45. Dorsal surface of brain of Tarsius spectrum 95 



46. Base of brain, Tarsius spectrum 96 



47. Right lateral surface of brain, Tarsius spectrum 98 



48. Ventral surface of brain stem of Tarsius spectrum 100 



49. Dorsal surface of brain stem of Tarsius spectrum loi 



50. Tarsius spectrum. Level of the first cervical segment 102 



XIX 





