1:8 —. OF THE HEART, VESSELS |. — 
5, which. fapplies the parts of the upper jaw, - the. eyé; FE 
nofe, the car, and ES fmall brariches to the fore- jest of eon 
brain, - : 
17. Pun the uppermoft vein D. F, of the £o B 
other fmall arferizr F, F. are fent off to the jaws. ^ After that 
a vein K is added, compolfed of the under vein H. of the fecond 
gill and upper one I of the third, - À little below the joining 
oi f all thefe veins a retrograde artery L, analogous to our ver- 
tebral, is fent off to the brain, cerebellum and top of the fpi- 
nal marrow, the branches at which have large and nume- 
rous communications with each other and with the cotrefpon- 
ding artery of the other fide; and from them chiefly the en- 
cephalon is fupplied. "Then: the trunk M, from which this 
artery came off, meets at N with its íclou: M from the other 
fide; and, about a finger-breadth lower, there is added, on : 
each fide; a vein R, formed by the under vein P els thethird - 
gill, and upper vein 'Q. of the fourth, 
18. About a-'quarter of an inch below the meeting cl al 
the above at 'T, is fent off from each fide, at nearly right an- 
gles, a very large artery U, analogous in fame meafure to our 
lubclavian. A large branch, a, from the root of that artery, 
fupplies fome parts of the lower j jaw, then running towards 
the fore - part of the gills,it anaftomofes freely with the exterior 
ends of all the branchial veins (7), after which it fends bran- 
ches Q. Q. Q. tho te gills themfelves, which feem to me ana- 
logous to our branchial arteries; efpecially as from the fame 
part the. heart receives its coronary ar£trier (&), "The reft of. 
the great artery, which I have called like to our fubclavian, 
fup- 


(i) Tab. I. 5. ^ et fig. 4. P. R, R, R. (Curfus fonguinis in hae - 
arteria fubclavia forfare retrogradus eft; fi enim ab initio trun- 
ci verfus ramos movetur, duplicem circulationem nempe mi- 
norem per has anaftomofes ct majorem per cor adeffe con- 
je&uro.) 
OD PuhisE.SS 
