[ 9 ] 
of two headlefs twins, in my poffefiion, whofe in- 
fide was intirely fimilar to that of other foetufes. 
I difcovered, notwithdanding, the following things, 
and I have reprefented the mod: effential in a rough 
fketch feen in figure 3. 
Figure 3. 
A. Is the region of the bread, whofe internal fur- 
face was lined with a membrane, which I took 
to be a diaphragm thrud back and duck to the 
pleura , becaufe it arofe from lumbar mufcular 
refembling the pillars of the dia- 
Under this fpecies of midriff was a very regular 
didribution of arteries and nerves, which I negledted 
to delineate, as thinking it ufelefs ; I contented my- 
felf with diffe&ing the aorta F. of which the upper 
ramifications were as ufual. 
B. is the lumbar region. 
C. Thofe of the ojja ilia , and of the pelvis. 
D. The umbilical cord paffing through an opening 
acrofs the teguments of the lower belly, to be 
brought into view. 
E. The intedines. 
F. The aorta fuperior before-mentioned. 
G. H. The integuments of all the right fide, opened 
on the back, to preferve it whole, and alfo thofe 
of the belly ; they are thrud to the right fide 
to give a view within. 
Vol. LVII. C a A. 
portions 
phragm . 
