PLATE 2 



KXPLAXATION OF FIGURES 



10 Surface view of ventral yolk showing the embryonic rudiment. Cephalic, 

 mandibular and thoracic areas recognizable. X 20. 



11 Same view, later stage embryo. Cephalic lobes, rudiment of appendages 

 and abdominal growth are the characteristics of this stage. X 2G. 



12 Same view. The peculiar bending of the embryonic axis preceding 

 revolution to dorsal yolk. (The egg is tipped slightly to the right). X 25. 



13 Lateral view showing the embryo passing around the right side of the egg. 

 (Egg is below normal size.) X 25. 



14 Lateral view. This embryo is passing around the left side of the egg. 

 X 27. 



15 Dorsal view. This stage is one shortly after the embryo has come to rest 

 on the dorsal yolk. X 27. 



240 



