298 ESSAYS anp OBSERVATIONS 
&c, adhering to the bones, I faw the cra- 
nium of a natural form on that fide where 
the face is, fo far back as the /ella turcica, 
behind which the ends of the cuneiform 
proceffes of the two occipital bones united 
together. From each of thefe cuneiform 
proceffes, the occipital bones extended of 
a natural enough form to each fides their 
fituation may be judged by confidering 
the figures at L, M, or O, O, having each 
a foramen magnum for the fpinal marrow. 
At the fide of each of the occipital bones, - 
neareft to the conjoined preternatural ears, 
an os petrofum was placed, but without 
having any fquamous part of the tem- 
poral bongs, fuch as were on the other 
fide of each occipital. Between thefe offa 
petrofa there was a triangular little bone 
which fuftained thefe preternatural ears, 
and was inftead of orethmoides, fphenoides, and 
two fquamous bones. The fecus with the 
face had therefore all the common nerves, 
but the fetus with only the conjoined ears 
wanted the 1.2. 3. 4. 5. and 6 pairs. 
THE meatusQ,Q, fig 2. led into the 
crgan of hearing. ‘The orifice R was the 
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