762 



is abnormal the naming is only approximate. It was observed however 

 that no part of the pectoralis muscles was attached to it. On the other 

 hand there were muscles corresponding to the Anconaeus, Dorsalis 

 scapulae, and Deltoideus [named according to Gaupp (6)] but in a 



very reduced condition. The muscles 

 of the fore arm w^ere not recognisable 

 as the amputation had occured immedia- 

 tely beyond the elbow joint. 



The nerve supply to the extra limb was 

 quite unusual and connected with an ab- 

 normal ganglion (s. fig. 2). Anterior to and 

 partially attached to the second spinal 

 nerve, which supplied the left arm in a nor- 

 mal manner, was a slender nerve which 

 after receiving a branch from the second 

 spinal nerve formed a noticeable ganglion. 

 From this ganglion two nerves were 

 given off which ran one to each side of the head of the abnormal arm 

 and two other smaller nerves were given off to the muscles around it. 



The arrangement of the blood vessels connected with this extra limb 

 could not be made out as they were ((uite colourless and extremely small. 



Fig. 2. Nerve supply of extra Arm 

 (?, Ganglion; ^Y, Normal Arm; T, 

 Tympanic membrane; T', Vertebral 

 Column; 7, II, III, First three spinal 

 nerves. 



S.S. 



CR. 



Fig. 3. Bones of Pectoral Girdle and Arms of Left Side of Specimen A. C. Clavicle; 

 Co, Coracoid; GB, Condylar Ridge; D, Deltoid Ridge; Ep, Epicoracoid; Ö, Glenoid 

 Cavity; Hh, Head of Humerus; H, Humerus; Sc, Scapula; S.S, Supra Scapula; C.B' , 

 D', 6', H & Sc', Corresponding parts of Supernuniary bones ; L', Proximal end of 



Radio-ulna. 



In the skeleton we meet with another abnormality in addition to 

 the extra limb. On the right side the pectoral girdle is quite normal 



