152 



the main mass of wliicli lies iatei-aliy to capsula inleiiia foniiing 

 the globus p'allidus. 



Small stripes of grey substance are occasionally found between the main lateral 

 mass of the palaeostiiatum (the globus pallidus), and its mesial vestiges, chiefly 

 between the fibres of the capsula proper and the anterior (olf.) cms of the comm. 

 anterior. 



Also other facts prove the liomology ol tlie globus pallidus and 

 those vestiges with the paiaeostrialiini augnientatiim (nieso-strialnm) 

 of birds. So in some animals (Hypsiprjmnus f. i.), we occasionally 

 find a contiiuialion of the lamina mednllaris externa (the limiting 

 layer between globns pallidus and pntamen) in the striatal part 

 mesial to the capsula interna, which lamella also medially may be 

 richly |)rovided with bloodvessels. 



Fig. 18. Dejehine's case "Longéry". Note the hypertrophy of the ependyma (Ep) 

 specially in the fiss. neo-palaeostriatica at X- — I^- ni. e. = lamina 

 mednllaris externa, L. m. i. = lamina medullaris interna. 



- Anotlier method to reinforce this homology is the method used 

 by Spatz ^), who showed that of all parts of the striatum the globus 

 pallidus obtains the deepest bine if applying sulfur ammonium to 

 the fresh (or formalinetixed) brainmaterial, — on account of its 

 ricliness in iron. 



I have applied this reaction to fiesli chicken brains and found 



1) Ueber den Eisennachweis im Gehirn, besonders in Zentren des extrapyramidal 

 motorischen Systems, Ister Teil. Zeitschr. f. d. gesamte Neur. und Psych. Bnd. 

 77, 1922. 



