" GROUSE DISEASE " STRONGYLOSIS 



209 



but they are more numerous in diseased than in healthy 

 birds. 



TABLE I. SHOWING THE RESULTS OF COUNTING THE STRONGYLI IN THE 



TWO C^ECA SEPARATELY. 



Table II. shows that the number of Strongyli present in 

 diseased birds, though varying considerably, is greatly in excess 

 of that found in the great majority of normal birds. In a 

 small minority of the presumably healthy birds the numbers 

 were as large as those found in many of the diseased birds. 

 It is, of course, impossible to be certain that these .exceptional 

 birds were not really suffering from the early stages of " Grouse 

 Disease." The two (Nos. 60 and 61) with the largest numbers 

 came from a moor on which " Grouse Disease " was prevalent 

 at the time. 



The presence in diseased birds of Strongyli in numbers far 



in excess of those found in normal birds does not, of course, 



o 



