Artificially Produced Cyclopean Fish 



3V 



63 



Monstra monophthalmica asymmetrica 



Fig. 59 Section through eyes of normal thirteen day embryo. 



Fig. 60 Section of seventy-six hour embryo with one normal and one small eye and perfect brain. 



Fig. 61 Section of the normal eye of a hatched embryo; a small eye with a lens is situated more ante- 

 riorly on the other side and behind this is a third lens, L, shown in the figure on the left side. 



Fig. 62 Section of normal eye in thirteen day embryo, the other eye is represented by the cellular 

 mass, e, close against the brain. 



Fig. 63 Section of normal eye in seventy-six hour embryo, the brain is bilateral and perfect, but 

 no indication exists of the right optic cup although the ectoderm of that side has formed a lens thicken- 

 ing L. 



