446 -Dr. brovssonet’s Account of 
mufcles being removed, we find the peritoneum, which lines the- 
abdominal cavity, and is adherent to the fwimming bladder by 
fome elongations. It is of a filver hue, with fome very fmall 
black points. The ventricle is not to be diftinguifhed from the 
mteflines by any other mark but by its fize : its form is ob- 
long ; it is extended almoft to the anus, from whence the 
inteftinal du£t has a retrograde courfe, and then defcends 
again, having a little dilatation near the anus.. On the vertebrae 
next the anus on the oiitfide of the peritoneum is a kind of 
cavity of an oblong form, containing a reddifh vifcus, which 1 
take to be the kidney. 
The firtt vertebra from the head has nothing very remarkable 
in its flruhlure. The fecond has on each fide an elongated and 
fharp apophyfis, to the apex of which is annexed a fmall liga- 
ment. The third is very flat, and has on each fide a kind of 
triangular and fharp apophyfis, to which adheres a ligament as 
to the fecopd. The fourth is remarkable in having a fharp 
apophyfis on each fide, articulated, with, the body of the 
vertebra, and under each of them, is another articulated apo- 
phyfis, flattifh, thick, roundifh at its extremities,, and forked 
at its balls (fig. 5.}. The fifth, which, is ftrongly adherent 
to the former, has in its middle a bifid procefs.. The fixth 
has in its middle a flattifh; elevation, fharp on each fide. 
Between the extremity of the larger apophyfis of the fourth 
vertebra, is a bone, or rather a hard cartilage, which bears the 
figure of a kidney (fig. 6.) its convexity being turned towards 
the body of the vertebra its pofition is parallel to the bodies of 
the vertebrae ♦, its motion is half circular 4 one of its parts,, 
viz. the lowed:, being in the cavity of the fwimming bladder,, 
fc) which it adheres by a thin membrane, fo that no air can: 
efcape at that part. It is covered by membranes, which adhere 
te%ly to its middle, in this part are fattened the two liga- 
ments 
