loO 



ANIMAL MECHANICS. 



The flex. poll. long, muscle is not distinct from the fl. dig. 

 prof, in either the Wolf or Dog, while 

 in the Fox it constitutes a small but dis- 

 tinct muscle, one-tenth of the weight of 

 the deep flexor, having a tendon of its 

 own, that joins the common tendon of the 

 deep flexor at the wrist. This arrange- 

 ment of tendons in the paw of the Fox is 

 shown in Fig. 18, and constitutes an addi- 

 tional distinction, separating the Fox from 

 the Dog and Wolf. 



4. The Fox examined by me was a 

 Bengal Fox, which gave the following 

 measurements : — 



Fig. 18. 



Bengal Fox {deep flexors of fingers). 



Weight. 



Flexor dig. prof . . 97.5 per cent. . 0.15 oz. av. 

 Flexor poll, long., . 2 5 . 0.015 ,, 



Total, . . 100.0 



I. 



First finger, . . 



2.5 per cent. 



2. 



Second finger, . 



• 20.7 



3- 



Third finger, 



• 19-5 » 



4- 



Fourth finger, . 



. 18.3 „ 



5- 



Fifth finger, . . 



. 18.3 „ 



6. 



Deficiency, . 



. 20.7 „ 





Total, . 



. 100.0 



The tendon of the fl. poll. long, acts upon the common 

 deep flexor tendon in the direction of the prolongation of the 



