1865. ] ANATOMY OF NYCTICEBUS. 245 
in Cheiromys’ and Tarsius*. Meckel* also describes in Loris “un 
faisceau charnu considérable’”’ as connecting these muscles. 
Fig. 2. 
Long flexor muscles and tendons of the hand. 
P.t. Pronator teres. F.s. Flexor sublimis digitorum. /F. p. Flexor profundus 
digitorum. /./.p. Flexor longus pollicis. 
The flexor profundus digitorum is a considerably larger muscle 
than the preceding. It arises from the upper two-thirds of the 
anterior surface of the ulna and the adjacent part of the interosseous 
ligament. The muscular fibres give origin to a strong tendon, which 
bifurcates, after being joined by the slip from the flexor sublimis, as 
above mentioned. One branch goes to the pollex, uniting with a 
tendon of the flexor longus pollicis; the other branch sends a very 
delicate tendon to join the deep tendon of the index, and then sub- 
divides, one subdivision constituting the perforating division of the 
fifth digit, the other subdivision uniting with the perforating tendon 
of the fourth digit (figs. 2 & 3, F’. p). 
? Owen, /. c. p. 63, pl. xxiii. fig. 4 e. 2 Burmeister, p. 59, t. 3. fig. 3. 
5 Anat. Comp. vol. vi. p. 341. 
