224 



INTRODUCTION TO ZOOLOGY. 



sufficiently powerful to reduce it to a pulp. To some the 

 dead animal body seems to be not less acceptable than the 



Branchial Artery \ 



Arterial Bulbx. 



Ventricle* --.^ 



Auricle 



Venous Sinus - 



Vena Forta 



Intestine- 



Vena Cava- ro 



X Vessels of the Gills 



Dorsal Artery 



"" Kidneys 



I Dorsal Artery 



Fig. 184. CIRCULATING APPARATUS OF FISH. 



living. Star-fishes, Crustacea, and such mollusca as are not 

 too bulky or too well defended, constitute a large portion of 

 the food of many fishes; and to this must be added the young 



