41 



excrescences analogous in structure to the "horns" 

 sometimes met with on the faces of Parrots. The 

 outer layers were hard and scaly, getting softer and 

 softer lower down till at the capsule of the joint the 

 matter was semi-fluid. On the metatarsus of one foot 

 there was one of these limpet like lumps midway 

 between the heel and the toes and in connection with 

 the sheath of a tendon. Of course as soon as one of 

 the scabs was raised it was quite evident even to the 

 unaided eye that the disease was not scaly-leg, and I 

 was not altogether surprised to find that while the 

 harder portion of the excrescences consisted princi- 

 pally of debris containing but few bacilli, the softer 

 portions were composed almost entirely of these, being 

 teeming masses of both Koch's and Davaine's forms. 



In both Red and Black Grouse have I found these 

 cheesy nodules. In one specimen of the latter species, 

 aged only six weeks, and sent to me by Mr. Pycraft, 

 there was a deposit two inches long in connection with 

 the wall of one of the caeca and practically filling its 

 lumen. 



A domestic fowl was sent alive to me by a gentle- 

 man at Gravesend, with the history that from time to 

 time he had lost birds from what appeared to be the 

 same disease. This pullet had been ill about three 

 months, eating but little and moping about the yard. 

 I killed it with chloroform and examined it at once. 

 It was very anaemic and almost a skeleton : the liver 

 was enormously enlarged, very soft, and literally full 

 of nodules : the spleen was the size of an ordinary- 

 hen's egg, very hard, and infiltrated with cheesy 

 nodules, its capsule being very tough. The abdominal 

 glands were much increased in size, some being cheesy, 

 some partially fatty, and some calcareous. The in- 

 testines were inflamed, and both caeca had a cheesy 

 nodule in their walls about half way down their length. 

 Projecting into the abdominal cavity from the right 



