278 PROF. ST.-GEORGE MIVART ON THE [Feb. 21, 
the left segment. The left lateral lobe is larger than the left central. 
The right lateral lobe extends more transversely than dorso-ventrally ; 
roughly estimated, it about equals the left lateral lobe in size. The 
right central lobe is quite undivided, showing only a superficial furrow 
on the middle of its abdominal surface. The Spigelian and caudate 
lobes are both triangular in outline ; and neither exhibits any segmen- 
tation. 
Thus the liver of Erethizon differs much from that of Hystrix 
javanica. In the latter I find’ that, though it agrees in having 
Brain of Hrethizon dorsatus. 
A, upper surface; B, ventral surface; C, side view; d, olfactory lobe ; op, optic 
nerves ; p.0, pituitary body ; 4, 5-7, 8, 9-12, pathetic, trigeminal, facial, 
auditory, glossopharyngeal, and hypoglossal nerves. 
the right segment much larger than the left, yet the left central 
lobe is larger than the left lateral one; that the right lateral lobe 
extends mainly dorso-ventrally ; that the right central lobe has a 
very deep cystic notch, in which a gall-bladder is found; that the 
right lateral lobe is larger than the left lateral lobe; that the left 
1 From a specimen (no. 808c) in the Museum of the Royal College of Sur- 
geous. 
