184 THE GROUSE IN HEALTH AND IN DISEASE 



had sat herself out on frosted eggs." There was no other abnormality dis- 

 covered except the large size of the spleen which measured 20 mm. in length 

 and 11 mm. in thickness. 



It is difficult to give any reason for this occurrence of sebaceous cystic 

 disease of the skin. No other case of the kind has been brought to the notice 

 of the Committee. It is somewhat analogous to acne, and it may pos- 

 sibly have been preceded by an eczematous irritation of the skin brought 

 about by Ixodes, the Grouse tick ; it resulted in any case in the failure 

 of feather growth and disease of the glands which should have assisted in 

 the process. 



The only other case which resembled it somewhat was Grouse No. 1792, 

 where Ixodes and Goniodes had again produced a great number of scabs and 

 sores and warty excrescences all over the face and head, and especially in the 

 neighbourhood of the ears and eyes. 



