ANIMAL MECHANICS. 



109 



of the foot is as follows : the fl. hall, long, and fl. dig. long. 

 unite into a common tendon, Fig. 14 ; this is joined in the sole 

 of the foot by the tendon of the large plantaris (pi.), and 

 the united tendons diverge to form 

 the tendons of the three toes. The 

 tendon of the accessorius muscle (acc.) 

 is inserted into the outer side of the 

 tendon of the third toe. 



Equal lengths of these tendons, 

 when weighed, gave the following 

 comparative results : — 

 Foot of Three-toed Sloth (long flexors). 



Weight. 



1. Accessorius, 14.2 per c. o.o6oz.av. 



2. Plantaris, . 10.0 ,, 013 „ 



3. Fl. hall, long., 12.0 ) 



4. Fl dig. long., 21.3 „ j °' 24 " 



5 . Friction, tyc ., 4 2 . 5 „ 



Total, -. . 100.0 Fig. I4 , 



1. First toe, . 



2. Second toe, 



3. Third toe, . 



Total, . 



(i.) The Rodents. — The following observations on the Hare 

 and Porcupine will suffice to show the general character of 

 the deep flexor tendons of the feet of this important Order : — 



1 . In the Hare, the fl. hall. long, and fl, dig. long, unite, as 

 in the Hedgehog, into a single tendon, before reaching the 

 heel, and this tendon is afterwards subdivided into four, dis- 

 tributed to the four toes. Equal lengths, when weighed, 

 gave the following results : — 



26.0 per cent. 

 43- 8 



30.2 „ 



