1871] MYOLOGY OF THE KINKAJOU. 553 



and terminates in the profundus tendon opposite the same point, and 

 situated between the tendons of insertion of the forementioned flanking 

 muscles. The three superficial tendons pass beneath the anterior 

 annular ligament, traverse the palmar aspect of the fore foot, and 

 form the perforated tendons of the second, third, and fourth digits. 

 The perforatus tendon of the fifth digit is formed by the flexor brevis 

 minimi digiti, to be presently described. In the Paradoxurus there 

 are two flanking slips only. The flexor minimi digiti longus gives 

 an additional slip to the fourth digit, joining the flexor-perforatus ten- 

 don opposite the first phalanx. 



The flexor profundus digitorum has the same origin as the flexor 

 pollicis longus and profundus digitorum of the human subject com- 

 bined. Immediately above the radio-ulnar carpal articulation this 

 large and fleshy muscle terminates in a strong and flattened tendon, 

 which divides, opposite the middle of the metacarpal shafts, into five 

 tendons, — one, the smallest, to the pollex ; the remainder to the re- 

 spective digits, perforating the superficial flexor tendons. This muscle 

 has associated with it four lumbricals, which are disposed as in the 

 human subject. There is no representative of the coronoid origin of 

 the flexor longus pollicis, so common in the human subject. 



The flexor minimi digiti longus. This peculiar muscle arises from 

 the pisiform bone and from the tendon of the palmaris longus in- 

 terims. Its muscular belly is wedge-shaped, and terminates in a 

 long, slender tendon, which splits to allow the perforans tendon of 

 the fifth digit to pass to the terminal phalanx. It is inserted into 

 the sides of the base of the second phalanx of the fifth digit. I have 

 found the homologue of this muscle several times in the human sub- 

 ject ; in one specimen it was especially remarkable, arising by two 

 distinct heads — one from an aborted and entirely tendinous represen- 

 tative of an additional palmaris longus, the other from the tendon of 

 the flexor carpi ulnaris. These two heads united together imme- 

 diately above the wrist-joint to form one well-developed muscle, which 

 finally joined to be inserted with the abductor minimi digiti. Pro- 

 fessor Wood has recorded several similar specimens* under the Dame 

 of abductor minimi digiti. This muscle is not, however, an abductor, 

 but decidedly a flexor of the little digit, and finds its homologue in 

 the perforatus flexor of the fifth digit in the Carnivores. 



The abdactor minimi digiti arises from the pisiform bone. It is 

 inserted into the base of the first phalanx and the inner sesamoid 

 bone opposite the metacarpo-phalangeal articulation. 



The flexor brevis minimi digiti brevis arises also from the pisiform 

 bone and tendon of the flexor carpi ulnaris. It is inserted into the 

 base of the first phalanx on its ulnar side, and into the sesamoid 

 bone. Besides these muscles there is another one, which corresponds 

 in position and attachment to the opponens. It arises tendinous 

 from the unciform bone and from the tendon of the flexor carpi 

 ulnaris, prolonged from the pisiform to the fourth metacarpal base ; 

 As it passes along the metacarpal bone it divides into two portions. 

 They are inserted into their respective sesamoid bones at the base of 

 * " Variations in Human Myology," Eoyal Society's Proceedings, Juno 1868. 



