706 MR. F, G. PARSONS ON THE [June 16, 
ficial and deep divisions of. the anterior crural nerve. A little 
lower down an internal circumflex comes off, which divides into a 
large transverse and a small ascending branch. The femoral 
artery then continues down Hunter’s canal, but no profunda 
femoris is given off. At the lower part of the canal it divides into 
two large branches, of which the anterior accompanies the internal 
saphenous nerve to the inner side of the leg. A little above the 
internal malleolus it divides into anterior and posterior, the former 
passing in front of the malleolus and deep to the tendon of the 
tibialis anticus, to supply the inner side of the dorsum of the foot, 
the latter supplying the sole of the foot, though no distinct 
external and internal plantar arteries are present. The posterior 
of the two branches of the femoral in Hunter’s canal is the 
popliteal, this passes between the semimembranosus and the femur, 
and divides into superficial and deep. The superficial is a muscular 
branch to the calf-muscles and runs down between the gastroene- 
mius and plantaris. The deep passes deeply to the plantaris, pierces 
the interosseous membrane to become the anterior tibial, and runs 
down along the outer side of the tendon of the extensor longus 
digitorum to the dorsum of the foot, the outer side of which it 
supplies. As soon as it reaches the commencement of the dorsum 
it gives off a communicating branch which passes superficial to the 
extensor longus digitorum to join the anterior branch of the 
internal saphenous artery already mentioned. 
The Internal Ilac artery divides into gluteal, pudic, and sciatic, 
of which the last is the largest. 
The Veins correspond fairly accurately with the arteries, the 
chief points worthy of notice being the large size of the external 
jugular, the presence of two anterior and a single undivided 
posterior venz cave, also of a single azygos vein, which lies on the 
right side and receives the intercostal veins from both sides of the 
thorax. 
The Nervous System. 
As the animal was not received in a perfectly fresh condition, 
I made no attempt to examine the brain and spinal cord. 
The Cranial Nerves differ but slightly from those of Man: the 
chief points of divergence noticed are:—(1) That the seventh 
nerve only divides into three chief branches on the face; (2) that 
the depressor nerve is separate from the vagus and comes off from 
the superior laryngeal as in the Rabbit; (3) that the eleventh 
nerve pierces the cleido-mastoid after supplying the sterno-mastoid 
and then passes on to the trapezius ; (4) that there is no descend- 
ing branch from the hypoglossal corresponding to the descendens 
cervicis of human anatomy, but the omo-hyoid, sterno-hyoid, and 
sterno-thyroid are supplied by a well-marked nerve which comes 
off from the Ist and 2nd cervical and corresponds to the com- 
municans cervicis. 
The Cervical Plexus is formed by the first four cervical nerves ; 
there is the usual loop on the ventral side of the transverse process 
