282 O. LARSELL 



dorsalis, and the tractus mammillocerebellaris, on the afferent 

 side. To these, in Amblystoma, should be added some fibers 

 from the trigeminus and also fibers of the VIII tract which 

 pass into the body of the cerebellum from the auricular lobe. 

 There are evidences of a tectocerebellar tract, but the fibers are 

 diffuse and are intermingled with other fibers in the region of 

 the entrance into the brain of the IV nerve in such a manner as 

 to be difficult of separation from the others. 



The efferent fibers include the brachium conjunctivum and 

 numerous arcuate fibers which are not aggregated into definite 

 tracts, but which appear to correspond to the cerebellotegmental 

 system. 



LITERATURE CITED 



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 Herrick, C. Judson 1914 The cerebellum of Necturus and other urodele Am- 

 phibia. Jour. Comp. Neur., vol. 24, pp. 1-29. 



1914 a The medulla oblongata of larval Amblystoma. Jour. Comp. 



Neur., vol. 24, pp. 343^27. 



1917 The internal structure of the midbrain and thalamus of Necturus. 



Jour. Comp. Neur., vol. 28, pp. 215-348. 

 Johnston, J. B. 1901 The brain of Acipenser. A contribution to the morphol- 

 ogy of the vertebrate brain. Zool. Jahrb., Bd. 15, S. 1-204. 



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 Kingsbury, B. F. 1895 On the brain of Necturus maculatus. Jour. Comp. 



Neur., vol. 5, pp. 139-205. 

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 Stieda, L. 1875 Ueber den Bau des centralen Nervensystems der Amphibien 



und Reptilien (I. Axolotl; II. Schildkrote). Zeits. fur wiss. Zool. 



Bd. 25. 



