226 MALL. [VoL. XIX. 
Fic. 201c.—Section through the top of the double eye of the embryo. 
30 times. The eyes are buried deep in the head, being covered with 
mesoderm and epidermis. 
here is very rich in blood-vessels, involves the walls of the 
brain, but does not reach into its ventricle. At the highest 
point of the head the epidermis has developed into a papilli- 
form body; below this there is a large necrotic area in which 
there is a great quantity of yellow pigment granules. 
The mouth is closed, although the alimentary canal from 
there to the stomach is open and appears normal. The intes- 
tine is matted together, the cloaca and anus being obliterated. 
The epithelium of the upper portion of the intestine shows 
marked growths into this matted mass. 
Fic. 201d.—Section through the optic nerve and double eye. XX 30 times. 
