Dislocations of the Shoulder. 193 



There is an unreduced sub-coracoid dislocation of the 

 humerus, and the edge of the glenoid cavity has caused a 

 depression upon the back of the anatomical neck. This part of 

 the bone is elongated, so that the neck of this humerus almost 

 resembles that of a femur. These changes may have been pro- 

 duced by a splitting of the great tuberosity against the edge of 

 the glenoid cavity at the time of the accident, and afterwards 

 by absorption from pressure and some new formation. (See 

 paper by Caird, "Edinburgh Medical Journal," 1886.) The 

 original glenoid cavity is partially filled up, and an imperfect 

 new one has been formed below the coracoid process, 



G. C. 3468. 

 Presented by Professor Struthers, January 1893. 



5. 6. Double Sub-eoracoid Dislocation of the Shoulder.— 



Plaster of Paris cast of the front of the chest and shoulders of 

 an adult, showing the above. 



The dislocation on the right side -R-as recent, that on the left side 

 was old-standing. 



It may be noted that the unreduced dislocations, Nos. 5. 3 

 and 5. 4 were also from one person. G. C. 2678. 



P)-ese7Ued by J . D. Gillespie, F.R.C.S.E. 



5. 7. Old-standing- Sub-g-lenoid Dislocation of the 



Shoulders. — Plaster of Paris cast of the upper part of the 

 chest and shoulders of an adult, showing the above. 



The appearances on the left side are characteristic of old- 

 standing dislocation. G. C. 3306. 



5. 8. Sub-spinous Dislocation of the Shoulder.— Right 



scapula and upper part of humerus, with the muscles partly 

 dissected — in spirit, to show the above. 



