Different Animals, Gc. 5OL 
2 
it, had nearly the usual size and structure, 
although the brain, cerebellum and \medulla> 
oblongata were entirely wanting, ‘we find reason 
for calling in question the common doctrine of 
authors, which teaches that the spinal marrow 
and nerves derive their origin from the brain and 
cerebellum and are dependent upon it, as much 
as the ducts of glands are upon the glands, which 
send liquors into them, | 2. Further, as the 
several parts of this monster were furnished with 
nerves, and as we have found, that its arteries 
and veins, by a well-regulated, varied and com- 
plicated action, circulated the blood, we must 
suppose, that their muscular fibres were actuated 
by those nerves. We therefore find in this 
monster, not only the existence and common; 
appearance of the spinal marrow and nerves con- 
nected with it, although the brain and cerebellum 
were wanting ; but we have proof, that. these, 
independent of the brain and cerebellum, may 
actuate the muscular fibres in the vessels of an 
animal, or that nervous energy, or fluid, as it is 
commonly called, is not derived from the brain 
and cerebellum solely ; that is, we conclude, 
that the nerves, as well as the brain and cerebellum, 
are capable of furnishing nervous energy ; and that 
there is no more reason for believing, that the nerves , 
are derived from the brain, than that the brain 7s 
derived from the nerves; or ali the parts and 
