PLATE XLIIl. 



"^Siffiftji 



Fl.:. 15. 



Fui. 16. 



N 





^v 



Fig. 17. 



V, 



Fig. 19. 



Fli:. 18. 





0m^<- 



Fig. 20. 



SECT10:N't^ OF C^CUM. 



Fk;. 15. ( x9) showing a transverse .section of the ctecuin of a norma] Grouse (No. 81). Tht- riclfjus (>') ami villi (/.) are well 



.shown, and three collection.^ of lymphoid ti-ssuc {c) are also seen. 

 FlQ. 16. ( x25) showing a portion of the same .'section more highly magnitied. 



Fig. 17. (x25) showing a portion of a section of the e:ecum of an apparently healthy wild Grouse (No. 69). 

 Fig. 18. (.x9) showing a transverse section of the ciccum of a diseased Grouse (No. 2). 



Fio. 19. ( x9) show'ing a transverse section of the ca'cum of a diseased Grouse (No. 15) very badly infected with Strongyli. 

 Fig. 20. (x25) showing a portion of Fig. 19 more highly magnified. Large numbers of worms are seen in transverse section 



as black dots. 



Opposite p. 288.] 



