PLATE XLIII. 



FIG. 17. 



Fie. 18. 



FIG. 19. 



SECTIONS OF OSCUM. 



FIG. 20. 



SI). The ridges (n) and villi (//) arc well 



Kic. 15. (xf) showing a transverse section of the c:i'cum of a normal Grouse (N< 



shown, and three collections of lymphoid tissue (c) are also seen. 

 FIG. 16. { x25) showing a portion of the same pection more highly magnified. 



Fi<;. 17. ( X25) showing a portion of a section of the ctucum of an apparently healthy wild Grouse. (Xo. 69). 

 Fl<;. 18. (x9) showing a transverse section of the cji-cnin of a diseased Grouse (No. 2). 



Flo. 19. ( X 9) showing a transverse section of the ciecnm of a diseased Grouse (No. 15) very badly infected with Strongyli. 

 Flii. 20. (x2fj) showing a j>ortion of Fig. 19 more highly magnified. Large numbers of worms are seen in transverse section 



as black dots. 



Opposite p. 288.] 



