MECHANISM OF THE CIRCULATION. 



61 



tho body is poured by the right auricle into the single ven- 

 tricle, which receives also the arterial blood from the left 

 auricle a portion of this mixed blood is returned to the 



Branchial Artery 



Arterial Bulb . 



\Vntricle of the 

 Heart, 



Auricle of the... 

 Heart. 



Venous Sinus 



Vena Porta% 

 Liver, &c. 



, Branchial Vessels. 



.- Dorsal Artery. 



Vena Cava 



Kidneys. 



Dorsal Artery or 

 Aorta." 



Fig. 43. Circulating Apparatus of the Fish. 



