CORTICAL GRAY MATTER. 257 



with many corticipetal fibers. ThePurkinje cells form the stratum 

 gangliosum. 



Cells. The bodies of Purkinje's cells (Figs. 82 and 83) are 

 located near the deep surface of the superficial layer in the 

 stratum gangliosum. They measure from 100/1 to 135/1 m their 

 longest axis. Each has one axone which, after piercing the deep 

 layer, becomes a fiber of the medullary body. It gives off, in the 

 deep layer, several recurrent collaterals, which form contact rela- 

 tions with other cells in both layers. From the outer end of 

 each cell-body antler- like processes, the dendrites, are given off; 

 they ramify toward the surface in a wide plane at right angles to 

 the free border of the gyrus. The edge of the plane only is seen 

 in a longitudinal section of the gyrus and the arborization is very 

 narrow and tall. The stellate cell-bodies, an outer and inner 

 layer, together form the stratum cinereum. They increase in size 

 toward the Purkinje cells. They have rich dendritic processes 

 and one axis-cylinder each. Their processes ramify through- 

 out the stratum cinereum and stratum gangliosum. The inner 

 layer of the stratum cinereum contains the larger cells; they are 

 called the "basket cells." Their axis- cylinder processes run 

 parallel with the surface and at right angles to the border of the 

 gyrus; they give off vertical branches, which descend to Purkinje's 

 corpuscles and inclose them in a basket work of filaments. In 

 the outer layer of the stratum cinereum the stellate cell-bodies 

 are smaller than in the inner layer. They branch freely and ter- 

 minate in claw-like end-tufts in contact with other stellate cells. 



The fibers of the superficial layer (Figs. 82 and 83) have 

 three sources: (a) The processes of neurones within the layer, 

 which include the dendrites and axones of the stellate cells and 

 the dendritic planes and recurrent collaterals of Purkinje's cells, 

 (b) The processes of cell-bodies in the deep layer, whose T- 

 branched axones pierce the dendritic planes of Purkinje in the 

 first layer; and, the processes of the large granules whose den- 

 drites ramify toward the surface, (c) The fibers of the medullary 

 projection rise or end largely in the cellular layer. The axones 

 of Purkinje's neurones compose all of the corticifugal fibers. 

 They end in the cerebellar and vestibular nuclei of the cat (Clark 

 17 



