64 



ANATOMY OF THE WOOD RAT 



to the flexor carpi radialis. Its stout tendon passes deep 

 to the branches of the flexor digitorum subHmis and diverges 

 in two parts, passing respectively to digits two and three. 



Caput ^ is a slender slip arising from the medial epicon- 

 dyle of the humerus deep to the flexor digitorum sublimis. 

 Its tendon is inserted into the common palmar tendon. 



Caput S is single and may be considered as a fusion of the 

 ulnar and radial heads that are distinct in many rodents. 



flcx.ivg. pro 



flex.civplraAr- 



flejcdi-jprol.!. 



— ^— £leK.di(j sabV 



flex.diq.pvoi.2 



He^.di.^.'pvoi.JS. 



ilex. dig. svitl 



Fig. 14. Deep flexors of the medial aspect of the right forearm of Teo' 

 noma. 



It lies deep mostly to caput 2 and the flexor carpi radialis, 

 and has a strong aponeurosis upon its superficial belly. 

 It arises from the second to fourth fifths of the caudal 

 border of the ulna, and from the proximal half of the radius. 

 Its aponeurosis converges to a broad, thick tendon, heavier 

 upon its lateral border, and this constitutes the main 

 portion of the palmar tendon. This divides into five 



