276 BURSJE MUCOSJE OF THE UPPER EXTREMITY. 



On the Forearm and Hand are situated, 



1. A very large bursa surrounding the tendon of the flexor 

 pollicis longus. 



2. Four long bursae lining the sheaths which enclose the 

 tendons of the flexors upon the fingers. 



3. Four short bursae on the forepart of the tendons of the 

 flexor digitorum sublimis in tlfe palm of the hand. 



4. A large bursa between the tendons of the flexor pollicis 

 longus, the forepart of the radius, and capsular ligament of the 

 os trapezium. 



5. A large bursa between the tendons of the flexor digitorum 

 profundus, and the forepart of the end of the radius, and capsu- 

 lar ligament of the wrist. 



These two last mentioned bursse are sometimes found to communicate with 



each other. 



7. A bursa between the tendon of the flexor carpi radialis 

 and os trapezium. 



8. Between the tendon of the flexor carpi ulnaris and os 

 pisiforme. 



9. Between the tendon of the extensor ossis metacarpi pollicis 

 and radius. 



10. A large bursa common to the extensores carpi radiales, 

 where they cross behind the extensor ossis metacarpi pollicis. 



11. Another common to the entensores carpi radiales, where 

 they cross behind the extensor secundi internodii pollicis. 



12. A third, at the insertion of the tendon of the extensor 

 carpi radialis brevior. 



13. A bursa for the tendon of the extensor secundi internodii 

 pollicis, which communicates with the second bursa common to 

 the extensores carpi radiales. 



14. Another bursa between the tendon of the extensor secun- 

 di internodii pollicis and metacarpal bone of the thumb. t 



15. A bursa between the tendons of the extensor of the fore, 

 middle, and ring fingers, and ligament of the wrist. 



16. For the tendons of the extensor of the little finger. 



17. Between the tendon of the extensor carpi ulnaris and 

 ligament of the wrist. 



