Macalister — On the Anatomy of Aonyx. 
543 
with the palm aris longus, which was inserted into the palmar fascia, 
and sends a fascial slip into the thumb. The flexor digitorum sublimis 
arises from the front of the flexor digitorum profundus tendons and 
sent tendons to the second, third, and fourth digits ; the flexor pro- 
fundus and flexor pollicis longus, as usual, had five heads, a radial 
condyloid, an ulnar condyloid, a mediar condyloid, an ulnar, and a 
radio-ulnar, the last being the morphological equivalent of the flexor 
pollicis. From the common mass were detached five tendons, which 
were distributed as usual ; the second, third, and fourth of these had lum- 
bricales attached thereto. The pronator quadratus stretched for half 
the length of the forearm. 
The supinator longus was very remarkable, its origin stretched above 
the pit for the brachialis anticus on the outside of the head of the humerus ; 
from this unusually high origin its fibres descended to the lower end 
of the radius and annular ligament, the fibres being continuously fleshy 
for the whole way down. 
There were two radial extensors of the carpus, long and short ; the 
first arose from the ridge above the outer condyle 1|" below the origin 
of the supinator longus, it was inserted by two tendons, one on each 
side of the metacarpal of the index. The tendon is united by a cross 
slip to that of the extensor carpi radialis brevis. 
Supinator brevis extended to the lower third of the radius. The 
extensor digitorum longus was inserted by four tendons, of which those 
to the fourth and fifth digits united with those of the next muscles. 
Extensor minimi digiti arose as usual and was inserted into the second 
phalanx of the little finger ; separate from it was an extensor tertii et 
quarti digiti, which arose from the outer condyle and ended in two ten- 
dons which bifurcated and passed to the third and fourth, and to the 
fourth and fifth digits. 
The extensor carpi ulnaris is normal, as is the extensor ossis meta- 
carpi pollicis (inserted into the radial sesamoid and first metacarpal. 
The extensor pollicis et indicis is purely ulnar in origin, and gives ofl" 
first, a tendon to the index, then one to pollex and index. 
The short muscles of the hand are : — Abductor minimi digiti from 
the pisiform to the first phalanx, in two slips. Abductor minimi 
digiti from the fascia over the trapezoid to the first phalanx. Abductor 
pollicis from the scaphoid to the first phalanx. Opponens pollicis to the 
metacarpal adductor from the os magnum, and flexor brevis pollicis from 
the trapezium. There is also a flexor brevis minimi digiti from the 
unciform. There are three palmar and four dorsal interossei arranged 
as usual. 
The large flat tail had great lateral fat masses and thirteen pairs of 
strong levatores caudae. 
The sartorius is double at origin, one part arises from the whole 
length of the iliac crest, the other arose from Pou part's ligament; both 
joined and formed one band which was inserted into the border of the 
ligamentum patellae at its tibial end ; the former head was larger than 
the latter (0-18 : 0'08)., 
