FIGURE 1.40. CLEAVAGE OF THE FROG'S OVUM.
FIGURES 1.41 TO 1.44. SECTIONS OF FERTILISED TOAD OVUM.
FIGURES 1.45 TO 1.48. GASTRULATION OF THE SALAMANDER.
FIGURE 1.49. SEGMENTATION OF THE LAMPREY.
FIGURE 1.50. GASTRULATION OF THE LAMPREY.
FIGURE 1.51. GASTRULATION OF CERATODUS.
FIGURE 1.52. OVUM OF A DEEP-SEA BONY FISH.
FIGURE 1.53. SEGMENTATION OF A BONY FISH.
FIGURE 1.54. DISCOID GASTRULA OF A BONY FISH.
FIGURES 1.55 AND 1.56. SECTIONS OF BLASTULA OF SHARK.