178 



4NTHR0P0ID APES. 



tendons, belonging to the second and third toes. 

 The flexor longus digitorum displays perforated 

 tendons for the fourth and fifth toes. The flexor 

 longus pollicis divides into two tendons, one of which 

 goes into the toe itself, while the other is connected 



Fig. 55. — Muscles on the upper side of chimpanzee's foot. 1. Tibialis anticus 

 muscle. . 3, Extensor proprius pollicis. 3, Extensor communis digitorum. 

 4, 5, Peroneus brevis and peroneus longus. 6, Tendon Achilles. 7, Extensor 

 brevis digitorum. 8, Slip of the same for great toe. 9, First dorsal inter- 

 osseous muscle. 10, Adductor pollicis. 11, Abductor minimi digiti. 



with the flexor longus digitorum, and displays per- 

 forated tendons for the third and fourth toes, while 

 the perforated tendons of the second and fifth toes 

 have their origin in the other flexor 



In the gorilla the lumbricales muscles of the foot 



