CENTERS OF CORRELATION. 225 



spinal cord and also in the indirect path by way of the pons 

 and the cerebellum. The mesial part of the pontial nuclei receives 

 ■collaterals from the lemniscus and hence is related to the somatic 

 sensory apparatus. 



DEMONSTRATION OR LABORATORY WORK. 



1. Study the tract cells of the spinal cord in Golgi sections of young 

 fish fry, frog tadpoles or chick embryos of the fifth to eighth day of 

 incubation. 



2. Study the lower olive and pontial nuclei in Golgi sections of the 

 brain of the mouse or other small mammal. 



3. Study the tract cells of the spinal cord of a fish or amphibian 

 and the cells and their relations to the four primary columns in the 

 medulla oblongata. 



LITERATURE. 



Cajal, S. R.: Beitrage zum Studium der Medulla oblongata. Leipzig 1896. 



Cajal, S. R.: Textura del sistema ner\'ioso del Hombre y de los Vertebra- 

 dos. Madrid 1904. 



Van Gehuchten, A.: La moelle epiniere de la truite {Trutta jario). La Cel- 

 lule, Tome II. 1895. 



