C 3°8 ] 
to each lobe of the lungs. The lungs are two long 
bags, one on each fide, which begin juft behind the 
heart, and pafs back through the whole length of the 
abdomen, nearly as far as the amis. They are largeft 
in the middle, and honey-combed on the internal Sur- 
face through their whole length. The heart confifts 
of one auricle and one ventricle. What anfwers to 
the inferior vena cava, pafles forwards above, but in a 
fulcus of the liver, and opens into a bag fimilar to the 
pericardium •, this bag iurrounds the heart and aorta, 
as the pericardium does in ether animals ; from this 
there is an opening into a vein which lies above, and 
upon the lei t of the auricle, which vein feems to 
receive the blood from the lungs, gills, and head, is 
analogous to the fuperior vena cava, and opens into 
the auricle which is upon the left of the ventricle. 
The aorta goes out, pa fling for a little way in a loofe 
fpiral turn, then becomes ftreigbt, where it feems to 
be mufcular; at this part the branches go off, between 
which there is a riling within the area of the aorta 
like a bird’s tongue, with its tip turned towards the 
heart*. 
* This account of the venae cavas opening into the cavity of 
the per cardium may appear incredible ; and it might be fuppofed, 
that, in the natural Hate of the parts, there is a canal of commu- 
nication going from one cava to the o her, which being broken 
or nipt through in the adt of catching or killing the animal, would 
give the appearance above described. I can only fay, that the 
appearances were what have heen dtferibed, in three different fub- 
jedts which 1 have difledled ; and. in all of them the pericardium 
was full of coagulated olood. But, belides the fmallnefs of the fub- 
jedfs, it may be obferved th t they had been long preferved in 
fpirits, whi.h made them more unfit for anatomical enquiries. 
They had been in my polfeifion above feven years. 
The 
