Different Animals, €c. 5O5 
5. A fetus has occurred, in which not only the 
brain and spinal marrow were wanting, but in 
which there was no evident appearance of nerves. 
A case of monstrosity of this kind is:related by 
Dr. Clarke in. the Philosophical: Transactions 
for 1793. P. II. p. 154 &c, and accompanied 
by two engravings. This monster was included 
‘in a distinct set of membranes and had a placenta 
belonging to it, the side of which was attached to 
the placenta of the perfect twin. It was covered 
with the common integuments; was of an oval 
2. .The communication betwixt the different parts of 
the nervous system is as free in the fetusin utero as after 
birth; the brain, spinal marrow and nerves being neither 
under the influence of pressure; nor of the action of ‘any 
narcotic or other power, which can diminish the nervous 
energy, 
g- The fetus in utero gives every indication of its 
Possessing sensation and voluntary motion, which a 
being, so situated, could possibly be expected to give. 
4- In whatever manner the respiration of the infant 
contributes to its power of sensation after birth, in the 
same manner does the respiration of the mother contri- 
bute to the sensibility of the living fetus in utero. . 
5+ If we grant, that the fetus, born at Bolton, from 
having no sensorium could have no sensation, no argu- 
ment can be drawn from thence against the power of 
sensation in a perfect fetus in utero; because a perfect 
fetus does possess sensation after birth and, agreeably to 
the above assumption, this defective fetus must, had it 
been born alive, have remained for ever destitute of sen- 
ation, 
