viii LIST OF ILLUSTRATIONS 



Figure Pace 



51. Tarsius spectrum. Level of the pyramidal decussation 104 



52. Tarsius spectrum. Level of the dorsal sensory nuclei 106 



53. Tarsius spectrum. Level of caudal tip of inferior olive 108 



54. Tarsius spectrum. Level through middle of inferior olive 11 1 



55. Tarsius spectrum. Level of the vestibular complex 114 



56. Tarsius spectrum. Level of caudal extremity of trapezoid body 116 



5~. Tarsius spectrum. Level of the cerebellar nuclei 118 



58. Tarsius spectrum. Level of the trochlear emergence 121 



59. Tarsius spectrum. Level of the inferior colliculus 123 



60. Tarsius spectrum. Level of the superior colliculus 128 



61. Tarsius spectrum. Level of the optic chiasm 131 



62. Tarsius spectrum. Level of the anterior commissure 132 



63. Ventral surface of the gray matter of the brain stem, tarsius spectrum (color) . . 137 



64. Dorsal surface of the gray matter of the brain stem, tarsius spectrum (co/or) . .139 



65. 66. Lateral surface of the gray matter of the brain stem, tarsius spectrum (co/or) 141, 143 



67, 68. Callithrix jacchus (marmoset) 154 



69-72. Hand and foot of marmoset 156, 15" 



73. Dorsal surface of brain, Callithrix jacchus (marmoset) 158 



74. Base of brain, Callithrix jacchus (marmoset) 159 



75. Left lateral surface of brain, Callithrix jacchus (marmoset) 160 



76. Right lateral surface of brain, Callithrix jacchus (marmoset) 161 



7~. Ventral surface of brain stem, Callithrix jacchus (marmoset) 162 



78. Dorsal surface of brain stem, Callithrix jacchus (marmoset) 163 



79. Marmoset. Level of the pyramidal decussation 165 



80. Marmoset. Level of the dorsal sensory nuclei 166 



81. Marmoset. Level of the tip of the inferior oli\e 167 



82. Marmoset. Lc\el tlirough the middle of till' inl'ciior oli\-e 169 



83. Marmoset. Level of the vestibular niick'I and tiiliorculum acusticum i-o 



84. Marmoset. Level of the cerebellar nuclei 171 



85. Marmoset. Le\el :it the middle of the j^ons Varolii 173 



86. Marmoset. Level of the inferior colliculus 174 



87. Marmoset. Level of the superior cerebellar peduncular decussation 176 



88. Marmoset. Level of the superior colliculus 178 



89. Marmoset. Level of the optic chiasm 180 



90. Marmoset. Level of the anterior commissure 181 



91. Ventral surface of the gray mattiT of the brain stem, Callithrix jacchus (color). . 185 



92. Dorsal surface of the gray matter of the brain stem, Callithrix jacchus (color) .187 



93. Liiteral surface of the gray matter of tlu- brain stem, Callithrix jacchus (color) . . 189 



94. Habitat group of Mycetes senlculus, the rcti howling monkey 192 



95. 96. Two views of Mycetes seniculus, showing prehensile tail I93 



97,98. Two views of Mycetes seniculus, the red howling monkey 194 



99. Habitat group of Ateles atcr, the spider monkey I95 



100. Ateles atcr, the spider monke\, showing prehensile tail. 196 



