445 
‘The vermis and lateral lobes of the cerebellum are short as in a normal 
brain. The only peculiarity noted in regard to the nerves was the 
failure of the optic nerves to cross, each remaining distinct until the 
eye ball is nearly reached when the two fuse to penetrate the eye ball 
as a single nerve. 


. 
’ 
‘ 
I Voovm vik X XI XI 
Fig. 7. Side view of cyclopian pig brain. The cerebral vesicle collapses when 
the brain is not floated in a fluid. 
The finer anatomy of the brain could not be worked due to the 
imperfect fixation and preservation. It was impossible to make out 
definite layers in the thin wall of the cerebral vesicle. A single lens 
was found in the eye but the retina was so macerated that no exact 
information could be obtained as to the distribution of the optic nerves. 
Summary. 
1. The presence of a definite nasal septum of cartilage and the 
innervation of the proboscis supports WILDER’sS view that the frontal 
proboscis is a normal structure that has been prevented from taking 
its usual position because of the location of the median eye. 
2. The inferior oblique muscles have fused into a single muscle, 
both ends of which are inserted in the sclera of the eye. 
3. The optic nerves do not form a chiasma. 
4. All of the regions of the brain except the telencephalon are 
apparently normal, unless it is the floor of the diencephalon. All 
of the 12 pairs of cranial nerves were located except the first, the 
olfactory. 
