64 



THE NERVOUS SYSTEM 



brain a fact of instructive contrast with all animals below the mam- 

 malian complexity, for in them it remains anterior to the rest of the 

 brain. In a young human embryo this same anterior position prevails, 



FIG. 33 



Cornu anticum. 



Septum lucidum. 

 Columnar }ornicis.- 



Corpus striatum: 

 Stria terminates. 



Thalamus opticus. 



Pulvinar. 



Brachium conjunc- 



ti-vum posticum. 

 Pedunculus cerebri. 



ad corpora 

 quadrigem- 

 ina. 



ad medullam 

 oblongatam. 



ad pontem. 



Ala cineri 



Obex. 



'Funiculus cuneiformis. 

 Funiculus gracUis. 



The human brain, within. 



'aput nuclei caudati. 



Capsula interna 

 (anterior limb) . 



Capsula externa. 

 Island of Reil. 

 Nucleus lentiformis. 

 'laustrum. 



Capsula interna 

 (posterior limb), 

 'halamus opticus, 



Corpus geniculatu 

 mediale. 



Cauda nuclei 

 caudati. 



Hippocampus. 



Calcar avis. 



but what is then only a small protuberance in front on each side gradually 

 grows outward and backward until at birth the "lobes" of the cerebrum 

 cover over all the rest. This preponderance is doubtless an index of the 



