301 
Fig. 1. From a wax model of the eye, optic ganglion and brain. Reconstructed 
from series K, adult 9. X 100. 
Fig. 2—10. Giant cells of the brain, Sections 1—9 of series K, adult 2. ?/,,, mu. 
Outlines with camera lucida; Leitz, oc. 1, obj. ir oil. Details with oc. 3 and 5. Reduced “ir 
