chap, xin.] COMPOUND LYMPHATIC GLANDS. 101 



cylinders do not completely fill out the compartments 

 made for them by the capsule and trabeculse respec- 

 tively, but a small peripheral zone of each compart- 

 ment is left free ; this is a lymphatic sinus. In the 

 cortex it is spoken of as a cortical (Fig. 61), in the 

 medulla as a medullary, lymph sinus (Fig. 62). The 



Fig. 62. From a Section through the Medulla of a Lymphatic Gland. 



a, Transition of the medullary cylinders of adenoid tissue into the cortical 

 follicles : 6, the lymph sinuses occupied by a reticulum ; c, the fibrous tissue 

 trabeculae ; rf, the medullary cylinders. (Atlas.) 



former is a space between the outer surface of the 

 cortical lymph follicle and the corresponding part of 

 the capsule or cortical septum, the latter between the 

 surface of a medullary cylinder and the trabeculse. 

 From wha.t has been said of the relation of the com- 

 partments, it follows that the cortical and medullary 

 lymph sinuses form one intercommunicating system. 



