MAMMALIA. 161 



In the jaguar the anterior and posterior caudal nerves are formed in a similar manner, 



after these have received all the spinal nerves they are continued to the extremity of 



the tail, giving off branches in their course. In the ass the gluteal nerves are sent 



from the sixth lumbar and first sacral at their junction with the sciatic, and terminate 



on the gluteal muscles and the tensor of the fascia of the thigh. A nerve given off 



from the sciatic, supplies the slender geminous, and is continued down to another 



muscle approximated with the great head of the triceps ; it is analogous to the square 



muscle, although it is so different in shape, and is supplied by the nerve always 



furnishing branches to the geminous. The anterior crural nerve supplies the sartorius 



and the other muscles in the place of the straight, the vast, and crural ; the saphenus 



descends with the vein giving numerous filaments to the ligaments and skin, and 



communicating at the side of the foot with the inner branch of the deep plantar nerve, 



and through this with a branch of the inner plantar to be distributed on the skin at 



the side of the foot. In the jaguar the saphenus nerve is very large, and in the 



baboon it appears much larger in proportion to the size of the limb than in man. In 



the ass the obturator nerve supplies the adductors and the large muscle corresponding 



with the gracile. The sciatic nerve gives branches to the muscles which ar^ in the 



place of the semi-membranous, semi-tendinous, and biceps ; it then divides into the 



posterior tibial, and the peroneal, both of which give branches to the biceps. The 



posterior tibial sends a branch down at the back of the gastrocnemius muscle, and on 



the outer side of the tendon of Achilles to the fascia, &c., on the outer side of the heel 



or part corresponding with the heel bone ; it then passes between the heads of the 



gastrocnemius muscle, to which and the large muscle in the place of the posterior 



tibial and the flexors of the toes it gives branches ; it descends on the inner side of 



the tendon of Achilles, giving branches to the fascia, &c., on the inner side of the heel 



and ankle ; near the heel it divides into the inner and outer plantar nerves ; the inner 



sends off a large branch obliquely over the flexor tendon to join the external plantar 



nerve ; it passes down on the inner side of the tendon, giving branches to the sheath, 



fascia, and integuments ; near the foot it gives off a large branch, which communicates 



with the inner branch of the deep plantar nerve, to be distributed on the skin at the 



Y 



