PAKENCHYMA OF THE ADKENALS. 



115 



In those animals which possess no external cell masses, the 

 super ficial columns of the cortex form shorter, frequently 

 anastomosing, rounded, and columnar masses, or are cylinders 



Fig. 157. 



Fig. 157. Horizontal section through the most external cortical 

 portion of the adrenal of the Horse, a, Closed cylinder of the surface ; 

 6, channel-like and cylindrical columns of the cortex ; c, stroma. 



that are continuous with each other by means of short arches 

 beneath the capsule, as in the Rabbit, Mouse, and Cat. The 

 cortical columns of the Horse are small columns, and channel- 

 likes bodies that towards the outer parts, in consequence of 

 the gradual coalescence of their borders, become converted into 

 hollow cylinders with blind extremities, (Kolliker, Eberth.) 



The cells of the cortical columns in the Ox are columnar or 

 polygonal, arranged with their long diameter at right angles 

 to the radius; in the Rabbit they are polygonal, and in the 

 Horse they form slender cylinders. In Man, as well as in other 



i 2 



