428 



iween the cortex and the central nuclei, the latter being in advance 

 in respect of the former. 



The filling up of the slit by the cells of the matrix is only a 

 compensatory act, restoring the normal relation. That only the human 

 cerebellum shows these relations is explained by the fact, that in the 

 human cerebellum the central nuclei and the fronto-cerebellar system, 

 which originates in these nuclei, attain their greatest development. 

 Considered from this point of view the anomalous character shown by 

 the human cerebellum is reduced to a structural characteristic of the 

 human cerebrum. 



Summary. 



1) The human cerebellum shows in a stage of development, cor- 

 responding with the end of the third month, a large intraventricular 

 prominence, covered by the tela chorioidea of the fourth ventricle (His, 

 Stroud, Bolk). 



2) The intraventricular growth of the cerebellum is caused by a 

 disharmony in the development between the central nuclei and the 

 cortex, the latter being behind in respect of the former. 



3) The cerebellar cortex shows centres of increased growth in 

 agreement with the statements of Bolk. 



Leyden, March 1st, 1908. 



Literature. 



1) v. MiHALKOVics, v., Entwickelungsgeschichte des Gehirns, Leipzig 

 1877. 



2) KoELLiKER, A., Entwickelungsgeschichte des Menschen und der 

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3) Ganser, S., Vergleichend-anatomische Studien über das Gehirn des 

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4) Hbrrick, C. L., Contribution to the comparative Morphology of the 

 Central Nervous System. Journ. comp. Neurology, Vol. 1, 189L 



5) His, W., Die Entwickelung des menschlichen Rautenhirns. Abh. 

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8) KuiTHAN, W., Entwickelung des Kleinhirns bei Säugetieren. Munch, 

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