252 ROBERT S. ELLIS 



The deficiency in cell number affords in large measure an 

 explanation of the motor defects found in subnormal individuals. 

 It shows, furthermore, that in idiocy and in imbecility we may 

 expect to find the whole brain defective rather than the frontal 

 lobes only, while the higher grade of defectives (morons) probably 

 show very slight deviations from the normal. 



Further studies in this field on better material with better- 

 known clinical histories in which is included a study of blood- 

 vessels, nerve fibers, neuroglia, and a cytological study of all 

 the important types of cells are necessary to bring out the more 

 detailed differences between these types of cerebella. 



For a review of the literature on the clinico-pathological study 

 of the cerebellum with a detailed report of a single case see 

 Archambault ('18). 



LITERATURE CITED 



Aechambault, La Salle 1918. Parenchymatous atrophj^ of the cerebellum. 



Jour, of Nerv. and Ment. Disease, vol. 48. ' 

 Berliner, K. 1905 Beitrage zur Histologie und Entwickelungsgeschichte des 



Kleinhirns. Archiv. f. mikr. Anat., Bd. 66. 

 BoLK, L. 1905-07 Das Cerebellum der Saugetiere. Petrus Camper, Neder- 



landsche Bijdragen tot de Anatomie, Bd. 3 u. 4. 

 Bolton, J. S. 1903 The histological basis of amentia and dementia. Arch, of 



Neurology, vol. 2. 



1910-11 A contribution to the localization of cerebral function based 



on the clinico-pathological study of mental disease. Brain, vol. 33. 

 GoDDARD, H. H. 1914 Feeble-mindedness. New York. 

 Hammarberg, ('. 1895 Jr'tudienuber Ivlinikund Pathologie der Idiotie. (Trans. 



from Swedish into German by W. Berger and pub. by S. E. Henschen). 



Upsala. 

 King, Helen D. 1910 The effect of fixatives on rats' brains. Anat. Rec, 



vol. 4. 

 RoNcoRONi, L. 1905 Lo sviluppo degli strati molecolari del cervello, etc. 



Arch, di Psichiat., vol. 26. 

 Rynberk, G. Van 1907-08 Die neuren Beitrage zur Anatomie und Physiologic 



des Kleinhirns der Sanger. Folia Neuro-biologica, Bd. 2. 



1912 Weitere Beitrage zum Localizations-problem im Kleinhirn. 



Folia Neurobiologica, Bd. 6, Supplement. 

 Tredgolj, a. F. 1903 Amentia. Arch, of Neurology, vol. 2. 



1914 Mental deficiency. 2nd Ed. London. 



