154 



THE LYMPHATIC SYSTEM 



lymph nodes have been divided into two varieties, which were 

 named hy Warthin * the " spleenolymph glands " and the " mar- 

 rowlympli glands" 



FIG. 150. HEMOLYMPH NODE OF THE SHEEP. 



The dark areas are blood sinuses ; the lighter portion within is lymphoid tissue. 

 Photo, x 35. (After Warthin.) 



In the spleenolymph type, which is the more abundant, the 

 gland is of small size and is well filled with secondary blood sinuses. 

 The lymphoid tissue is supported by a similar reticulum, and con- 

 tains the same varieties of lymphatic corpuscles as in the lym- 

 phatic nodes. 



In the marrowlymph glands a somewhat similar structure is 

 found. The blood sinuses are less numerous and lymphatic folli- 

 cles do not occur (Vincent, Warthin). The eosinophile leucocytes 

 are more numerous than in the spleenolymph type, and the mar- 

 rowlymph glands as a rule are the larger. 



* J. Bost. Soc. Med. Sc., 1901. 



