T h e t h i r d R i n g
Prefents four dorfal mufeles, C, D, E,. F. The firff dbrfaE
mufcle, C, is inferted at the third divifion under the mufeles d and a,,
where it communicates, by means of fome fibres, with the mufcle-
f of the fecond ring; from thence it proceeds obliquely towards-
the intermediate fuperior line, and is fixed at the fourth divifion,.
As foon as C is retrenched, the mufcle D is feen j this grows-
wider from the anterior extremity; it lies in a contrary direftiom
to the mufcle C, and is inferted into the third and fourth
divifions.
The mufcle E lies in the fame direction as the mufcle C, but
not fo obliquely; the lower infertion is at the fourth divifion, the;
other is at the third, immediately under C ,
The mufcle F is nearly parallel to D, which joins to i t ; the*
firft infertion is vifible, the other is at the fourth divifion, under
the mufeles E and G.
There are no lateral mufeles to be deferibed in this ring,.
T he eight following R ings.
There are only two dorfal mufeles, and no lateral ones, to be
deferibed in thefe rings.
O f
O f thefe two mufeles, D is the only one that is altogether feen;
it is very large, and diminifhes gradually in breadth, from ring
to ring, to the laft, branching off in fome places.
E is one o f the firait mufeles o f the back, and is inferted at the
divifions o f it’s own ring, under the dividing mufeles 0.
A nterior Pa r t of the twelfth R ing. ,
There are three dorfal mufeles, D, E, F, to be confidered in
this part.
The mufcle D is fimilar to D o f the preceding ring, only that
it terminates at the fubdivifion o f it’s ring, and is confequently
only half as long.
E is o f the fame length, and differs from the mufcle E o f the
preceding ring only in it’s direflion.
The mufcle F is parallel to E, and {hotter; it’s anterior end
does not reach the twelfth divifion.
P o s t e r i o r P a r t .
There is only one dorfal mufcle here, which is fattened by
lome fhort mufeles to the fubdivittohs o f the laft ring, traverfing .
the mufeles «, and being fixed there, as i f defigned to ftrengthen
them, and to vary their direction.
T t s a. is