242 



DIGESTION. 



patches (Fig. 77) are usually free. In the condition in which 

 they have been most commonly examined, each gland appears 

 as a circular opaque-white sacculus, from half a line to a line 



Agminate follicles, or Peyer's patch, in a state of distension : magnified about 5 

 diameters (after Boehm). 



in diameter, and, according to the degree in which it is de- 

 veloped, either sunk beneath, or more or less prominently 

 raised on, the surface of a depression or fossa in the mucous 



FIG. 77. 



FIG. 76. Solitary gland of small intestine Rafter Boehm). 



FIG. 77. Part of a patch of the so-called Peyer's glands magnified, showing the 

 various forms of the sacculi, with their zone of foramina. The rest of the mem- 

 brane marked with Lieberkuhn's follicles, and sprinkled with villi (after Boehm). 



