PRIMROSE : THE ANATOMY OF THE ORANG OUTANG 
49 
to the dorsum of the foot. The sartorius muscle is usually very feebly 
developed in the anthropoid apes as compared with man. Gegenbaur 
states^ that the sartorius is as well developed in the anthropoid apes 
as it is in man, but this is by no means invariably the case — ^in my 
Orang it was very rudimentary, and Fick found it so also in the same 
animal. Bischoff, too, and Duvernoy^ state that the muscle is weak 
in the Gorilla, whilst Gratiolet and Alix^ found it weakly developed 
in the Chimpanzee. The attachment of the sartorius to the inner side 
of the knee joint, similar to that found by Rudolf, has been described 
in man (Testut). 
The Adductor longus arose from the inner portion of Pou part’s 
ligament and from Gimbernat’s ligament and from the pubis extending 
I cm. along the bone on the superior part of the horizontal ramus 
immediately external to the pubic spine ; it was inserted into the inner 
aspect of the femur, the line of insertion being 1.5 cm. long, the lower 
limit of this line being only 2 cm. above the internal condyle. 
The Pectineus^ lying in the same plane as the adductor longus at its 
origin, arose from the horizontal ramus of the pubis, the origin being i 
cm. wide, continuous there with the adductor longus as it passes back- 
wards and downwards, wrapping itself around the shaft of the femur, 
and was inserted into the posterior aspect of the femur at the junction 
of the middle and upper thirds, the insertion being 2.5 cm. wide. 
The Adductor brevis arose from the pubis immediately beneath the 
adductor longuSj by an origin 1.5 cm. wide ; it was inserted into the 
posterior aspect of the femur on a plane posterior to that of the 
pectineus. The muscle was supplied by the obturator nerve. 
The Adductor magnus^ a large bulky muscle, arose from the pubic 
bone opposite the whole extent of the symphysis immediately subjacent 
to the gracilis, and on the same plane as the adductor brevis at its 
origin. The attachment of origin extends back along the descending 
ramus of the pubis and the ascending ramus of the ischium to within i 
cm. of the tuberosity of the ischium. The lower, or inner border was 
thick and rounded, whilst the upper (or outer) was thin and attenuated. 
The lower part of the muscle was inserted by a rounded tendon into the 
internal condyle of the femur, the lowest fibres passing to the internal 
lateral ligament of the knee joint. The muscle above this point is 
inserted into the posterior aspect of the femur in a plane posterior to the 
1 Loc. cit., (Lehrbuch) Vol. I, p. 439. 
2 Loc. cit., p. go. 
3 Loc. cit., p. 186. 
