1408 
on the dorsal face (fig. 5). The vesicle is opened (d) and partially 
turned back. It is adherent to the dura mater (in c), and this also 
is turned back, but over the cerebellum. Here too two hemispheres 
are found, united in their undivided frontal part. 
Two small optie nerves close to each other (N. II) form the 
Fig. 5. Dorsal face of the brain of a Fie. 6. Ventral face of this’ brain 
cyclopian calve (cyclopia incompleta). (Letters as in fig. 4). 
a. brain matter, b. roof of the IId 
ventricle, turned over to the front and 
to the back. c. adherence to the dura 
mater also turned back. d. entrance to 
the IId ventricle. 
chiasma and the occipital parts of the two hemispheres are, notwith- 
standing the complication of hydropically extended lateral ventricles, 
relatively well developed. 
The defect in the bone, often only small in eyclopian buman 
beings, is in calves very important. In the proboscis of them is 
seen a fully developed nose, divided into two halves, with a septum, 
conchae ete., fastened to a bony piece, proximally from the os fron- 
tale, as the X photo shows. 
Closer research will still have to prove whether this piece of 
bone represents the remaining part of the ethmoidal. One thing 
however is certain: a large part of the praechordal tissue, out of which 
the middle-part of the nose will develop is not only present, it has 
reached a full-grown development. 
In the second eyelopian calf still more interesting details appear. 
