( »8o ) 
Circle it makes when it cometh out of the Hem, to 
accommodate itfelf to the motions of the Animal, and 
to make room for its Head, which is placed under 
this Artery in the Left Side, when he draws it into his 
Shell : And ’tis for that reafon that the Left Branch of 
the Trachea Arteria is longer than the flight. This Ar- 
tery is alfo bigger than the Right Aorta, becaufe that 
it furnilheth a greater number of Parts with Blood. It 
hath a diftin fi: Orifice into the Ventricle of the Heart, 
and hath not the leaft Communication with the Pulmo- 
nary Arteries, neither in the Heart nor in any other 
Part. This dees notrefemble at all to the DhUhs Arte - 
riofas, or, as a certain Modern is pleafed to call it, the 
Canal of Communication, in the Heart of an Human 
p£tHS. « 
The third Artery going out from the Bafts of the 
Heart of this Animal, is that which I call Aorta defeen- 
dens dextra : After having pierced the Pericardium it finks 
towards the Back, then returning through rhe Lungs 
into the Abdomen, where it receives the Branch of the 
Aorta finiftra , it is deftributed to the Right Kidney, 
Thighs, Bladder, and Parts of Generation ; So that I call 
thefe two Arteries, Arteri£ Aor.t£ defeendentes , becaufe 
they diftribute the Blood to all the Inferior Parts of this 
Animalj the fame as the Aorta defeendens doth in all 
other Animals. 
The fourth Artery going out from the Heart, is the 
Aorta a feendens. It hath an Orifice in the Ventricle 'of 
the Heart, common with the Aorta defeendens dextra : 
■It appears ini part under the Aorta fuifird coming out of 
the Heart, and afeendeth in a ftrait Line till it hath 
pierced the Pericardium j after which it divideth into 
three principal Branches^ whereof the two lateral go to 
the fore Legs, and make the Carotid^ the third afeends 
all along ibU Trachea Arter.ia towards die Larynx, and 
gives Branches to aii :the<iParts of the Neck. 
The 
