ABNORMAL FORMATIONS IN THE BRAIN. 
healthy. The liver was quite free from disease or enlargement, 
no softening nor paleness in colour, but perfectly firm ; which 
is a fact, I believe, not generally observed in aged horses when 
examined after death. 
The head and a portion of the neck I had removed for the pur- 
pose of dissection ; and it was in taking out the brain that I ob- 
served the structures I shall next describe. On removing the en- 
cephalon from its bony case, I found at the base and at the external 
part of the organ, a number of white granules of a similar form 
and about the same size as grains of rice after being saturated with 
water. These granules were collected in scattered groups, which 
groups allowed of being easily broken up, for they did not adhere 
to the brain but to a vascular-looking network of fibres, which 
came out of the interior of the brain and rested upon the bones 
forming the brain case. 
On removing the substance of the cerebral hemispheres and the 
corpus callosum, and thus exposing the lateral ventricles, two 
singular looking bodies were fully exposed to view, which bodies 
I will successively describe as they then presented themselves. 
One of these bodies is larger than the other; the smaller occupies, 
or rather is placed in, the right ventricle; the larger in the left one. 
The length of the small body is one inch and six eighths; its 
superior half is lobulated ; and its colour is that of a dirty looking 
grey; its form is ovoid; it rests upon or against the corpus striatum; 
its superior extremity touches the hippocampus major; and its 
inferior extremity extends into the inferior cornu; attached to it 
superiorly and posteriorly is a small portion of the choroid plexus; 
it appears, in fact, to have its matrix within the plexus. The por- 
tion of brain against which it rests or presses presents a faint red 
blush of a somewhat dull aspect. The weight of this body is 
exactly 3ijss. 
The large body, I have stated, rests within the left ventricle; it 
is similar in every respect to the small one with regard to colour, 
form, &c. ; its length is two inches and five eighths ; its circum- 
ference three inches and three eighths, and its weight 3yj. This 
body, from pressing upon the floor of the ventricle, has caused that 
portion against which its inferior half rested to be entirely 
absorbed ; while the remaining portion is considerably thinner than 
natural. Throughout the portion that remains, against which the 
body immediately rests, is also a red blush, which is much deeper 
in tone than the colour in the ventricle. 
These bodies are entirely composed of the rice-looking granules, 
which have all their nucleus in the plexus choroides; and they all 
appear to take one general course, and that is a longitudinal one. 
A granule can easily be separated from the mass, and several of 
