88 



ANATOMY OF THE WOOD RAT 



the interossei, has origin apparently from the ectocimei- 

 form and is inserted onto the internal sesamoid of the 

 same toe. 



M. abductor hallucis (fig. 18) arises from the scaphoid 

 and is inserted upon the border of the medial tarso-phalan- 

 geal sesamoid of the hallux. 



— extens. ViHutls 



— erteu^. di^-long. 



- V — tibiil. ajitlc. 



■luTnlirlcaVes 



aV)i>*c, haUuc— Sf- V' ' l/|— abiiit. dlq.S 



n 



J^ — Yl.ex, digAirev. 



tlexfLbul— L-J 



quad plantae 



Fig. 18. A, Dorsal aspect of left pes of Teonoma, showing superficial 

 tendons and muscle. 



B, Plantar aspect of left pes of Homodontomys, showing superficial 

 muscles and tendons. 



M. abductor digiti quinti (fig. 18) has origin that is 

 chiefly tendinous from the anterior portion of the calca- 

 neum. Insertion is upon the lateral side of the first 

 phalanx of digit five. 



M. flexor digiti quinti brevis hes mediad to the 

 abductor of this toe and must be carefully distinguished. 



