212 THE GROUSE IN HEALTH AND IN DISEASE 



than in any other months of the year. This fact is brought out 

 in Tables III. and IV., from which it will be seen that while 

 twenty birds are reported to have been diseased in April and 

 May only five are shown during the remainder of the year. 



TABLE IV. SHOWING THE SEASONAL PREVALENCE OF THE PRINCIPAL 



GROUSE ENTOZOA. 



* The btrongyli in one cii'cum counted and number found doubled. 



The serious injuries caused by the presence of T. pergracilis 

 in the cseca, the accompanying symptoms and the general 

 pathology may now be referred to. 



When the caecum of an infected Grouse is examined it will 

 be found to show certain well-marked appearances. 



Instead of an intestine of a brownish or greenish grey colour 

 moderately filled with soft brown pasty material, and showing 

 greyish yellow lines running down its length on the outside 



