The cerebellum of the frog

The cerebellum of the frog is of considerable morphological importance because of its relatively simple structure. The further fact that here in the same species there are present in larval stages both lateral line and vestibular systems, while in the adult the latter alone remains, adds interest to a detailed study of this part of the brain in this animal. In view of the close relationship of these two sensory systems to the development of the cerebellum, it is of importance to observe the results of nature's experiment, which has eliminated the lateral line apparatus and its connections in the adult frog. The frog's cerebellum was studied in considerable detail, particularly as regards its connections, by Wlassak ( '87) chiefly with the aid of the Weigert technique. Subsequently it was described by Gaupp ('99), who however relied largely on Wlassak's work for details. Banchi ( '03) has given an account of the organ in the toad (Bufo). Kappers and Hammer ( '18) describe the cerebellum of the bull-frog briefly, and more recently Kappers ( '21) has summarized the studies on amphibian cerebella, making use of a manuscript by Rothig, in addition to the observations just cited, for a description of the anuran cerebellum. ROthig's account has not been accessible to me, and has only come to my attention since my own observations were completed through the reference by Kappers. A more detailed comparison of the results obtained by Rothig with my own would be highly desirable, but is not possible at the present time. No formal review of the literature will be attempted in this paper.