490 Diseases of Joints. 



the articular margin has just begun. The bony ridges on the 

 great trochanter are unusually well marked. 



G.C.I 122. 



Presented hy Robekt Knox, F.R.C.S.E. 



7.168. Advancing" Arthpitis Deformans.— Eight hip-joint of 



an elderly person, in spirit, with the muscles and ligaments 



dissected off — illustrating the above. 



The cartilage at the upper and anterior part of the head 



has been replaced by smooth bone. Elsewhere the place of the 



cartilage is taken up by a vascular substance, which has been 



ossifying, and has at many places, especially at the margin, 



developed irregular pieces of new bone. Some new bone has also 



been thrown out on the neck, especially along the front and at 



the top. G. C. 1120. 



Presented bij Robert Knox, F.R.C.S.E. 



7.169. Advanced Arthritis Deformans.— Bones forming the 



right hip-joint of an elderly person — macerated, showing con- 

 siderable changes on the articular surfaces. 



The head of the femur is enlarged, chiefly by the develop- 

 ment of new bone on and round the margins of the articular 

 surface. The central portion of the head of the bone has lost 

 the usual depression for the ligamentum teres, and is smooth 

 and eburnated, although somewhat porous in one or two places. 

 The development of new bone extends on to the neck, 

 especially in front. The cavity of the acetabulum is shallow, 

 partly by enlargement at the upper side, and partly by filling in 

 at the bottom, where the usual deficiency at the attachment of 

 the ligamentum teres has been bridged over. The upper part is 

 smooth and partly eburnated. There has been an irregular 

 deposit of new bone around the cotyloid margin. G. C. 1230. 



7. 170. Advanced Arthritis Deformans. — Bones forming the 



