PISCES 



^33 



with numerous valves, which lead into tlie auricle, and the conus 

 arteriosus with six valves, which carries the blood anteriorly from 



■Mondfbulor 

 •Frontat 



Spirocular 



Bcrsi/or 



£Jff'eTna/ cor-of/d 

 ■Inferno/ carotid 

 — Comrnon carotid 

 — Superior coronary 



Hyo 'dean 



•Anterior innominote 



Posterior coronary 



Ventral aorta 



Verfebrol 



Posterior innominate 



Auric le (ofrium) 

 ■Afferent ttronctiiof 

 Nutrient arteries fgil/s) 



■Efferent brancttio/ 

 ttypotironchia/ 



Ventricle 



Bracftial 



■Sob-clovian 



Superior mesenteric 



Fig. 1 10. Arterial circulation of skate. (Drawn by W. J. Moore.) 



the heart to the ventral aorta. (Figure no.) In fishes the heart is 

 at the anterior end of the coelome. (Figure in.) The walls of 

 the ventricle are thick and the walls of the auricle are thin. The 



