extraordinary Human Foetus. 131 
The eighth pair of nerves had its natural origin from each 
brain, and gave off the usual branches in passing down the 
neck. In the chest, the pair derived from the right head sup- 
plied the right heart, lungs, stomach, &c. The pair from the 
left head, was distributed in a similar manner to the organs 0/ 
the left side. Branches were detached from each pair to the 
semilunar ganglion. 
A pair of intercostal nerves proceeded also from each head. 
In describing them, it will be convenient to distinguish those 
which passed on the inside of each spine, by the name of 
inner intercostals : those on the outside of each spine, by that 
of outer intercostals. There was this peculiarity in the inner 
intercostal nerves, that they passed along, without giving off, 
or receiving communicating branches, or forming the usual 
ganglia, in consequence of the want of all the cervical, dorsal, 
and lumbar nerves, on the inner side of each spine, except the 
first cervicals. In the chest, the two inner intercostals formed 
a junction, and accompanied the descending aorta downwards. 
But before this joint nerve arrived at the semilunar ganglion, 
two considerable branches were detached, which continued to 
accompany the aorta, and were ultimately lost in the cavity 
of the pelvis. The greatest part of the nerve, however, ter- 
minated in the semilunar ganglion. 
The outer intercostals, or those passing on the outside of 
each spine, had, as far as I could investigate them, their usual 
distribution. 
I have already had occasion to mention the deficiency of all 
the cervical, dorsal, and lumbar nerves, on the inside of each 
spine; except the first cervicals, of course all the nerves, 
which are commonly derived from them, were wanting. Thus 
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