246 MESSRS. MIVART AND MURIE ON THE [Feb. 28, 
Profs. S. Van der Kolk and Vrolik fail altogether to distinguish 
the flexor profundus digitorum from the flexor longus pollicis, and 
omit all notice of the arrangement and distribution of the tendons 
except that of the pollex. 
In the Hunterian Lectures, 1864, Prof. Huxley’ described these 
muscles in Nycticebus tardigradus, and with that description our 
observations agree, except as regards the very delicate tendon which 
we found joining the index tendon of the flexor longus pollicis. 
The *flexor longus pollicis is a very distinct muscle, and as large 
as both the flexor sublimis and flexor profundus taken together. It 
consists of two separate bellies, one of which arises from the inner 
condyle and intermuscular septa, the other from the middle third 
of the anterior surface of the radius and from the interosseous liga- 
ment. These two muscular bundles join and give origin to a very 
large tendon, which bifurcates, the smaller portion joining the ten- 
don of the flexor profundus to form the long flexor tendon of the 
pollex ; the other portion again divides, one part again subdividing, 
its two subdivisions constituting the long flexor tendons of the index 
and third digits respectively, the other part joins the tendon of the 
flexor profundus to form the long perforating tendon of the fourth 
digit, as before mentioned (figs. 2 & 3, F. 1. p). 
Fig. 3. 
5 3 
Diagram of the tendons of the palm of the hand. The numbers correspond to 
the digits, the letters to the same muscles as in fig. 2. 
This agrees well with Professor Huxley’s description already re- 
ferred to. From what Meckel’ says, it would appear that in Loris 
this muscle is united with the preceding, as in so many other of the 
Primates, including Tarsius*. 
1 Med. Times and Gaz. 1864, Aug. 6th, vol. ii. no. 736, p. 145. 
? Anat. Comp. vol. vi. p. 341. 
* Burmeister, p. 60, t. 3. fig. 3, no. 34. 
