. The Journal of comparative neurology and psychology. phalica in Scylliumcanicula, Acipenser and ISTecturus, showing that in each of these thebundle joined the sensory root of the trigeminus. Since then thebundle has been studied in Scyllium stellare, Squalus acanthias,Cryptobranchus, the common toad, a turtle, the mole, rabbit, rat,mouse, cat, pig embryos, one human embryo of mm. and in 6oo Journal of Comparative Neurology and Psychology. iVptal human brains prepared after the method of Fleehsig. Thecells of origin have been studied in Scyllium, Squalus, Acipenser, thetoad, the rabbit,
. The Journal of comparative neurology and psychology. phalica in Scylliumcanicula, Acipenser and ISTecturus, showing that in each of these thebundle joined the sensory root of the trigeminus. Since then thebundle has been studied in Scyllium stellare, Squalus acanthias,Cryptobranchus, the common toad, a turtle, the mole, rabbit, rat,mouse, cat, pig embryos, one human embryo of mm. and in 6oo Journal of Comparative Neurology and Psychology. iVptal human brains prepared after the method of Fleehsig. Thecells of origin have been studied in Scyllium, Squalus, Acipenser, thetoad, the rabbit, rat, and the human embryo. The preparations ofthis embryo were demonstrated at the meeting of the American Asso-ciation of Anatomists at Ann Arbor, in 1906, and the results of thestudy of the mole, rat and cat were reported in a paper read at thattime. Instead of a systematic review of the findings in each of thesespecies, which would require a series of long and tedious descriptions,it seems best to take up the important features which bear upon the. Fig. 1. Camera drawings of cells of the uuolens maguocelhilaris tecti inScyllium showing their processes entering the radix mesencephalica trigemini. connections and function of this bundle. The more important pointshave been clearly seen in all the species mentioned. 1. The Origin of the Bundle.—So far as the cells in the locuscoeruleus of mammals are concerned, there has been no serious ques-tion as to the origin of these fibers from the large vesicular cells sincethis was first stated by ]\Ieynert. The demonstration of this by Cajalby means of the Golgi silver method left nothing to be desired. As forthe cells in the mesencephalon of fishes (nucleus magnocel hilar istecti), I expressed some doubt in my earlier paper. At that time Ihad not seen Van Gehuchtens paper and my preparations did notshow the entrance of processes of the large cells into the trigeminalbundles. Later preparations of the brains of Scyllium canicula, S. J
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