348 MESSRS. MURIE AND MIVART ON THE [Apr. 11, 
The gracilis is a broad muscle, arising from the symphysis pubis, 
being inserted into the inner side of the tibia between the insertions 
of the semitendinosus and the semimembranosus. 
The rectus femoris is a very strong muscle, arising from the anterior 
inferior spinous process of the ilium just above the acetabulum, and 
inserted as usual. 
The vastus externus (fig. 11, V.e.) and the vastus internus were 
not unusual, except that they were well separated from the next, and 
were almost entirely muscular to their insertion into the patella. 
The ecrureus is wonderfully distinct and strong, remarkably so if 
contrasted with its condition in Man. Fibres extend all along the 
front shaft of the femur, and are inserted into the patella and capsule 
of the joint. There is a strong glistening tendon in the middle of its 
front surface; but the sides are muscular down to its insertion. 
Meckel* notes the distinctness in this animal of the four component 
parts of the quadriceps extensor femoris. 
The adductor magnus arises from the symphysis pubis, its poste- 
rior half, and is inserted into the lower half of the lea aspera and 
the internal condyle of the femur (fig. 9, 4. m. and fig. 11, Ad. mag.). 
The origin of the adductor brevis is from the anterior half of sym- 
physis pubis, and its insertion is into linea aspera of the femur, above 
the last. 
The adductor longus arises by a distinct tendon from the anterior 
end of the symphysis pubis, and is inserted into the middle of the 
shaft of the femur anteriorly, and internally to the two last. It is 
this muscle which Meckel+ appears to have described as the pecti- 
neus, adding that there are only two adductors. He appears not to 
have noticed the next. 
The pectineus arises from the brim of the pelvis, from the junction 
of the ilium with the pubes to the middle line of the body. It is 
inserted into the line leading from the lesser trochanter to the linea 
aspera (fig. 10, P.). 
The tibialis anticus has origin from the inner side of tibia to about 
a quarter of its length from its summit. It is inserted into the inner 
side of the metatarsal of the second digit (figs. 11 & 12, 7. a.). 
Huxley says, this muscle is wanting in the Pig. 
The extensor longus pollicis is wanting. 
The extensor longus digitorum is smaller in size than the tibialis 
anticus, and it is situated on its outer side. It arises between the 
heads of the tibia and fibula, a few fibres of origin coming from both, 
but chiefly by a tendon from the outer condyle of the femur. It 
ends in three tendons, which are inserted into the three digits. 
Meckel§ says, this muscle does not arise from the femur either in 
the Hyraz or Pig; but we found it to do so distinctly in our specimen, 
and Prof. Huxley, in his recent Hunterian Course, described it as so 
doing in the Pig. (Figs. 11 & 12, #. 1. d.) 
The peroneus longus, which is comparatively a large muscle, arises 
from the head of the fibula, the external lateral ligament passing 
* Loc. cit. p. 403. t Loe. cit. p. 377. 
{ Hunterian Course for 1865. § Anat. Comp. t. viii. p. 426. 
