LIST OF ILLUSTRATIONS. 



xv 



FIG. PACK 



91. Human Embryo of 32 mm , 151 



92. Human Embryo of 34 mm. Front View of Face 152 



93. Human Embryo of 55 mm. Seventy-live Days, 152 



94. Human Embryo of 78 mm. Three Months, 153 



95. Front View of the Face of the Embryo Shown in Fig. 94, 153 



96. Human Embryo of 120 mm. (? One Hundred and Ten Days), 154 



97. Human Embryo of 118 mm. One Hundred and Six Days 154 



98. Human Embryo of 155 mm. One Hundred and Twenty-three Days 155 



99. Pig Embryo of 10 mm., 160 



100. Transverse Section of Pig Embryo of 12 mm., facing 163 



101. Pig Embryo of 12.0 mm. Reconstruction from the Transverse Sections, Series 5 (drawn by Dr. 



F. T. Leivis), 163 



102. Anterior Wall of the Pharynx of a Human Embryo of 3.2 mm. (after IV. //is), 164 



103. Aonic System of His's Embryo Bl, 4.25 mm. (after W. His), 164 



104. Transverse Section of Pig Embryo of 12 mm., facing 165 



105. Pig Embryo of 12.0 mm. Reconstruction from the Transverse Sections, Series 5 (drawn by Dr. 



F. T. Lewis), 165 



106. Transverse Section of Pig Embryo of 12 mm. facing 167 



107. Pig Embryo of 12.0 mm. Reconstruction from the Transverse Sections, Series 5 (drawn by Dr. 



F. T. Lewis), 167 



108. Transverse Section of Pig Embryo of 12 mm., Jacim; 169 



109. Pig Embryo of 1 2.0 mm. Reconstruction from the Transverse Sections, Series 5 (drawn by Dr. 



F. T. Lewis), 169 



110. Pig Embryo of 15 mm., 170 



111. Pig Embryo of 20 mm 172 



112. Reconstruction of a Pig Embryo of 12. o mm. with Indications of the Planes of Sections Figured, . 174 



113. Pig, 12.0 mm. Transverse Series 5, Section 185, 176 



114. Portion of Fig. 113 More Highly Magnified, ' 179 



IIS- P'g> I2 -° mm - Transverse Series 5, Section 19S, 1S2 



116. Pig, 12.0 mm. Transverse Series 5, Section 249, 185 



117. Pig, 12.0 mm. Transverse Series 5, Section 292, 1S8 



115. Pig, 12.0 mm. Transverse Series 5, Section 321 192 



119. Pig, 12.0 mm. Transverse Series 5, Section 353, 194 



120. Pig, 12.0 mm. Transverse Series 5, Section 470, 197 



121. Pig, 12.0 mm. Transverse Series 5, Section 513, 200 



122. Pig, 12.0 mm. Transverse Series 5, Section 633, 203 



123. Pig, 12.0 mm. Sagittal Series 7, Section 70, - 206 



124. Pig, 12.0 mm. No. 7. Sagittal Section 25 209 



125. Pig, 12.0 mm. Frontal Series 6, Section 284, 212 



126. Pig, 12.0 mm. Frontal Series 6, Section 340, 213 



127. Pig, 12.0 mm. Frontal Series 6, Section 3S0, 214 



128. Pig, 12.0 mm. Frontal Series 6, Section 572, 216 



129. Pig, 9.0 mm. Transverse Series 9, Section 171 218 



130. Pig, 9.0 mm. Sagittal Series 53, Section 213, 220 



131. Pig, 9.0 mm. Frontal Series 54, Section 194, 223 



132. Pig, 9.0 mm. Frontal Series 54, Section 194, 224 



133. Pig, 9.0 mm. Frontal Series, 54, Section 459, . 228 



134. Pig, 6.0 mm. Transverse Series 9, Section 90 229 



I 35- f'g> 6.0 mm. Transverse Series 9, Section 519 230 



136. Pig, 17.0 mm. Transverse Series 51, Section 464 232 



•37- P'g. l7-° mm. Transverse Series 51, Section 651, 236 



138. Pig, 17.0 mm. Transverse Series 51, Section 759, 238 



'39- Pig. 170 mm. Frontal Series 39, Section 63 240 



140. Pig, 20.0 mm. Transverse Series 59, Section 522, 241 



141. Pig, 20.0 mm. Transverse Series 59, Section 522 243 



142. Pig, 20.0 mm. Transverse Series 59, Section 701, 245 



143. Pig, 20.0 mm. Transverse Series 59, Section 1253, 248 



144. Pig, 20.0 mm. Transverse Series 59, Section 1043, 2 49 



145. Pig, 20.0 mm. Sagittal Series 60, Section 213, 252 



146. Pig, 20.0 mm. Frontal Section of Head. Series 40, Section 6S, 254 



147. Pig, 20.0 mm. Frontal Section of Head. Series 40, Section 84, . . . 256 



14S. Pig, 20.0 mm. Frontal Section of Head. Series 40, Section 123, 257 



