FIGURE 1.133. HUMAN EMBRYO AT THE SANDAL-STAGE.

FIGURE 1.134. EMBRYONIC SHIELD OF RABBIT.

FIGURE 1.135. EMBRYONIC SHIELD OF OPOSSUM.

FIGURE 1.136. EMBRYONIC DISK OF A CHICK.

FIGURE 1.137. EMBRYONIC DISK OF A HIGHER VERTEBRATE.

FIGURES 1.138 TO 1.142. SECTIONS OF MATURING MAMMAL EMBRYO.

FIGURES 1.143 TO 1.146. SECTIONS OF EMBRYONIC CHICKS.

FIGURE 1.147. SECTION OF EMBRYONIC CHICK.

FIGURE 1.148. SECTION OF FORE-HALF OF CHICK-EMBRYO.

FIGURES 1.149 AND 1.150. SECTIONS OF HUMAN EMBRYOS.

FIGURE 1.151. SECTION OF A SHARK-EMBRYO.

FIGURE 1.152. SECTION OF A DUCK-EMBRYO.

FIGURES 1.153 TO 1.155. SOLE-SHAPED EMBRYONIC DISK OF CHICK.

FIGURES 1.156 AND 1.157. EMBRYO OF THE AMPHIOXUS.

FIGURES 1.158 TO 1.160. EMBRYO OF THE AMPHIOXUS.