C »« 3 
of the Bone ; and, underneath a fmall Portion of the 
Medulla of a very thin Confidence. There was no 
Opportunity of making a further Examination, thro" 
the Mother’s Importunities : But the lumbal Verte- 
bra and Os facrum were taken out, as appears in the 
Figure annexed. 
Tab. I. Fig. i. by C M-. 
A By The Vertebra of the Loins. 
B C, The Os faerttm . 
CT), The OJJa Coccyges. 
E F, The fpinal Procelles of the Vertebra of the 
Loins j which Spines are here difeontinued, and 
an Opening formed, 
F G H /, quite into the Canal of the Vertebra ; fo 
that the Medulla fpinalis was intirely laid bare 
without any bony Covering. This Opening has 
been miftaken for a Parting of the fpinal Pro- 
cedes into Two Rows; or as if at F they had 
divided into Two Branches 5 the Two Edges F and 
G feeling thro’ the Integuments like a Bifurcation 
of the Spine, and fo have given Rife to the No- 
tion of a Spina bifida ; which Cafe I doubt whe- 
ther it ever exifts : For a perfett Spina bifida mud 
fuppofe the very Canal and Medulla fpinalis to 
divide into Two Branches, the Bodies of the Ver- 
tebra to become near twice as wide as ufual, and 
the fpinal Proceffes to divaricate into Two Rows 
or Ridges of Spines. C. M. 
Dr. Rutty , late Seer. R. S. has communicated a 
Cafe like this. See thefe Tranfaffi* n, $ 66 . p. 98. 
B 2 
III. An 
