-* AND CIRCULATION IN FISHES, ^ r9: 
mulcles of the back: and lateral parts form a trunk refembling 
eur right ;fabrlaviam vein; to Nhich the internal jugular 33, 
and exfernal jugulür 34 ave foon added. — A little farther iu, 
the right veta cava hepatica 3 V, terminates; and this, at 220 
is joined to the left vena cava hepatica, — '"U'he communicating 
canal alfo receives.the blood from a middle lobe of the liver; 
that organ being divided into three lobes. — ''he two cavae 355. 
at laít meets, and after receiving the coronary veins 37 of the. 
- heart, difcharge themfelves through a round hole with rifing 
edges into the back part of the auricle of the heart, 
«98. Within the external jugular veins, and at the termi- 
nation. of the internal jugulars, | obferve a pair of valver, like 
to thofe in the veins of the human fubject. — At the termina- 
- tion of the renal veine and large branches of the hepatic veins 
we find fingle membranes fixed by threads from their edges, 
refembling the valve of the coronary vein of our heart; and 
at the termination of the other large veins, efpecially near the 
heart, we not only find the orifices contraced, but doublings 
at their edges, which have fo far the effet of valves, . even 
in the dead body, that we cannot fill completely all the veins 
by throwing an injection in at one of their branches; and bet- 
ween the auricle and ventricle, valves are interpofed, which 
perform. their office with great accuracy, Uu 
wr c Set, V. 
-29. . After tracing the blood in its ceurfe, 1 compared 
with each other the coa; of the different veffels, through 
which it paffes, - | 
3o. When the large branches of the branchial arteries 
and veins, or the branches of tle aorta, formed by the lat- 
ter, were placed contiguous, Tue were found to agree very 
ncary in thicknefs, elaflicety, and texture; nor could I per- 
"cive that the. fmall branches of the branchial veins differed 
- from the fmall branches. of the atteries,. or that any particu- 
E A : EN NOTAE lar 
