106 THE CATFISH. 



Arising from the front of the ventricle is the light colored, conical 

 bulbus arteriosus from which spring the branches of the arterial 

 system. 



The dissection of the brain and other portions of the nervous system 

 will not be taken up in this exercise. 



Exercise 8. Make a drawing oj the heart on an enlarged scale, showing its 

 several divisions. 



