94 



ELEMENTS OF HISTOLOGY. [Chap. xn. 



of the former ; and in the mucous membrane of the 

 nasal cavity and vagina. 



(2) Cwds, cylinders, or patches of adenoid tissue ; 

 in the omentum and pleura, and in the spleen (Mal- 

 pighian corpuscles). 



(3) Lymph follicles, i.e., oval or spherical masses 

 more or less well denned ; in the tonsils, at the root 

 of the tongue, in the upper part of the pharynx (pharynx- 

 tonsil), in the stomach, small and large intestine ; in 

 the nasal mucous membrane, in the large and small 

 bronchi ; and in the spleen (Malpighian corpuscles). 



124. The tonsils (Fig. 58) are masses of lymph folli- 

 cles and diffuse adenoid tissue covered with a thin mucous 

 membrane, which penetrates in the shape of longer or 



Fig. 58. Vertical Section through part of the Tonsil of Dog. 



, Stratified pavement epithelium covering the free surface of the mucous 

 membrane. The tissue of the mucous membrane is infiltrated with adenoid 

 tissue, /.lymph follicles; m, mucous gland of the submucous tissue. (Atlas.) 



