. 



XXVI 



LIST OF ILLUSTRATIONS. 



53. Diagrams of the Development of the Three Layers of the 1 



Blastudermic Membrane j 



54. Similar Diagrams Antcro-posterior Sections . 



55. Diagram of the Membranes of the Ovum 



56. Human Ovum, 12 to 13 days ..... 



57. Human Ovum, 15 days ...... 



58. Embryo from the preceding Ovum .... 



59. Human Ovum in the Fourth Week .... 



60. Face of an Embryo of 25 to 28 days .... 



61. Longitudinal Section of Head of Embryo at Four Weeks 



62. Section of the Medulla of Embryo at Six Weeks 



63. Diagram of Development of Lens .... 



64. Heart of Embryo, Fifth Week ..... 



65. Diagram of Formation of the Aortic Arches and Large Arteries 



66. Diagram of Formation of the Main Systematic Veins . 



67. Development of External Genital Organs 



Osteology. 



68. A Cervical Vertebra . 



69. Atlas 



70. Axis .... 



71. Seventh Cervical Vertebra 



72. A Dorsal Vertebra 



73. Peculiar Dorsal Vertebra 



74. A Lumbar Vertebra 



75 to 80. Development of a Vertebra 



81. Sacrum, anterior surface 



82. Vertical Section of the Sacrum 



83. Sacrum, posterior surface 



84 to 86. Development of Sacrum . 



87. Coccyx, anterior and posterior surface 



88. Lateral View of Spine . 



89. Occipital Bone, outer surface 

 SO. Occipital Bone, inner surface 



91. Occipital Bone, development of 



92. Parietal Bone, external surface 



93. Parietal Bone, internal surface 



94. Frontal Bone, outer surface 



95. Frontal Bone, inner surface 



96. Frontal Bone at Birth . 



97. Tempo.-al Bone, outer surface 



98. Temporal Bone, inner surface 



99. Temporal Bon.e, petrous portion 



100. Temporal Bone, development of 



101. Sphenoid Bone, superior surface 



102. Sphenoid Bone, anterior surface 



103. Sphenoid Bone, posterior surface 



104. Plan of the Development of Sphenoid 



105. Ethmoid Bone, outer surface . 



106. Perpendicular Plate of Ethmoid, enlarged 



107. Ethmoid Bone, inner surface of right 



108. Skull at birth, showing the anterior and post 



109. Lateral Fontanelles 



110. Nasal Bone, outer surface 



111. Nasal Bone, inner surface 



112. Superior Maxillary Bone, outer surface 

 118. Superior Maxillary Bone, inner surface 



1 11. lrvc -lnpini'iit. of Superior Maxillary Bone 



I l.i. I.urln yinal I'.mie, outer surface 

 lid. Malar Bone, outer surface 

 117. M al:ir I '< 'iio, inner surface 



1 1 -. l';il;itc Hum', Interior view, enlarged 



I 1 '.i. 1'iilute Bone, posterior view, enlarged 



1 _'(. Inferior Turbinateil limn-, innrr surface 



r_M. Inferior Tiirbiuatcd Bone, outer surface 



TJ2. Vomor . 



rj:<. Lower .Taw. outer surface 



\2\. Lower Jaw, inner surface 



