It is of great value from time to time to compare recent advances in the study of human anatomy with such facts as were formerly known and accepted by scientists as definitely determined. The attempt is well justified in connection with the various terminations of the optic nerve, although many excellent papers on this subject, especially in regard to the primary endings of the nerve, have in the past been published : those on the experimental work of Minkowski,1 Brouwer and Zeemann2 and Putnam and Putnam3 ; those on the comparative studies of LeGros Clark,4 Huber and Crosby5 and Ariëns Kappers, Huber and Crosby,6 and others which will be quoted hereafter. Thorough studies which I have made have revealed several new facts discussed in this paper.
It may first be predicated that all the fibers of the optic nerve arise in the retina ; the existence