48 DR. J. MURIE ON THE MANATEE, 
PLATE IX. 
The Brain, Nerves, and Blood-vessels, of natural size. 
Fig. 1. Side view. Drawn after preservation in alcohol, but modified from the cast and 
from a hasty outline of the object when fresh. 
Fig. 2. Top view, in situ within the skull. The accurate and finished drawing of this 
was made before the brain was removed, the bones only being worked up 
from the dried skull. 
Fig. 3. Basal view, with cranial and three pairs of cervical nerves. This was drawn 
from the specimen after preservation in alcohol, but guided by a drawing 
taken immediately after extraction, when fresh, along with cast of the cranial 
cavity. 
~ The lettering applicable to these three figures is as follows :—1, 2, 3, 5, 6, 7, 8, 9, cor- 
responding cranial nerves, the fourth not being shown, and 5* being lesser root of fifth; 
Cc", C°, O°, first, second, and third cervical nerves; ga, ganglion of same; Ca, Casserian 
ganglion; d°, the three divisions of the fifth nerve; pd, portio dura, and pm, portio 
mollis of seventh nerve; gph, glossopharyngeal, pn, pneumogastric, and spa, spinal ac- 
cessory divisions of eighth nerve ; hy, hypoglossal or ninth nerve ; ga, ganglion of first 
spinal nerve ; 7, rete mirabile, and th, theca of spinal cord; ac, anterior cerebral, mc, 
middle cerebral, pc, posterior cerebral arteries ; ic, position of internal carotid artery cut 
short; W, circle of Willis; , basilar artery; Fr, frontal bone cut through; co, con- 
dyle of occipital bone. 
