150 MALL. [Vor.ux Ux 
1 Oo 
Fic. 12c.—From a reconstruction in wax. X 40 times. Cs, eighth cervical 
myotome; OV, optic vesicle; AV, auditory vesicle; H, heart; VOM, 
yolk vein; P, ccelom; UV’, umbilical vesicle; Os, third occipital myo- 
tome; All, allantois; Am, amnion. : 
Fic. 12d.—View of the embryo to show the open spinal cord below and 
the atrophic head with large neuropore. 
