Anatomical Diagnosis: 



All the cats in this experiment presented 

 the same appearance; Marked emaciation; 

 greenish purulent exudate filling the nasal 

 sinuses and extending over the surfaces of the 

 naso-pharynx and down into the trachea as far 

 as the bifurcation. There was a complete ab- 

 sence of any lesions in any other organs. No. 

 haemorrhages. Streptococcus hemolyticus in 

 pure culture obtained from heart's blood of 

 all four animals. This was also the predomin- 

 ating organism in the exudate of the upper 

 respiratory tract. 



There is, in general, agreement in the results obtained 

 from these four cases. In all the opsonic index for the spe- 



(37) 



