J'PYSICAL AND LITERARY. 27i 



ral form on that fide where the face is, fo 

 far back as the fella turcica^ behind which 

 the ends of the cuneiform procefTes of the 

 two occipital bones united together. From 

 each of thefe cuneiform procelTes the occi- 

 pital bones extended of a natural enough 

 form to each fide ; their fitwation may be 

 judged by confidering the figures at L, M, 

 or O, O, having each 2iJoramen magnum for 

 the fpinal marrow. At the fide of each of 

 the occipital bones, neareft to the conjoined 

 preternatural ears, an os petrofufn was placed, 

 but without having any fquammous part of 

 the temporal bones, fuch as were on the o- 

 ther fide of each occipital. Between thefe 

 ojja petrofa there was a triangular little bone 

 which fuftained thefe preternatural ears, 

 and was inftead of os ethmoides^ fphenoides, 

 and two fquammous bones. Th^fcefiis with 

 the face had therefore all the common nerves, 

 but the fcetus with only the conjoined ears 

 wanted the i, 2, 3, 4, 5, and 6 pairs. 



The 7}ieatus Q.iQ.Jig. 2. led into the organ 

 of hearing. The orifice R was the entry to 

 a pafiage which opened into the cefophagm of 

 %\i^Jcetui D D. 



The 



