FIGURE 1.131. EMBRYO OF THE OPOSSUM.
FIGURE 1.132. EMBRYONIC SHIELD OF THE RABBIT.
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.