PROGRESS OF VETERINARY SCIENCE AND ART. 647 
A similar specimen exists in the Stuttgart Museum; it 
occurred in a lamb, which Hering observed alive for several 
days ; the cerebellum was lying in a small bag on the occiput, 
only covered by the membranes of the brain. 
The tissues or shreds discoverable in the sack, of the case 
Hering has recently observed, were doubtless the remains of 
the vascular network. The dura mater thickened, because 
covered with granulations where the cranial cavity had given 
way, and the cerebellum separated thus from the other parts 
of the brain, was absorbed. This is seen in those monsters 
with absence of the spinal canal and cord, in which the nerves 
exist from their very origin. 
When monsters are deprived of a portion of brain, they are 
generally the cerebral hemispheres which are found wanting, 
the optic thalami and corpora quadrigemina remaining intact. 
In some monstrosities, it is true, only the medulla oblongata 
has been found ; but in these cases the monsters died imme- 
diately after birth. 
According to the experiments of Magendie, Flourens, 
Hertwig, Longet, Krauss, and others, the superficial parts of 
the cerebellum can be removed without proving fatal to 
animals ; they display weakness and insecurity in their move- 
ments, and, when the cerebellum is entirely extirpated, death 
is not necessarily its sequel. Sucking animals outlived the 
experiments several hours, and birds several days. This is 
clearly explained by the cerebellum guiding the performance 
of certain movements not absolutely necessary for the pre- 
servation of the individual; the action of the respiratory and 
circulatory organs depending on the spinal chord, and when 
this is injured, death must necessarily ensue. 
The preceding observations demonstrate that an animal 
may live without cerebellum; it confirms the opinions of 
physiologists, that the cerebellum rules the movements of 
animal life, destined for special purposes, as walking, stand- 
ing, or grasping ; the above-mentioned calf could move all its 
limbs, but could not co-ordinate those movements requisite for 
standing, walking, &c. — Repertor. der Thierheil , April , 1855. 
The above case, so thoroughly studied by the learned 
Hering, is sufficient to excite a love for teratological investiga- 
tions. It is replete with facts for consideration, especially in 
these times, when the physiology of the nervous system 
attracts so much attention, and that even Sir Charles Bell’s 
and Longet’s views of the excito-motory system have been 
impugned. I shall shortly consider the whole subject in 
reviewing a 4 Memoir’ by Brown-Sequard, recently read before 
the Academy of Sciences of Paris. 
16, Upper Woburn Place. 
