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TRANSACTIONS OF THE AMERICAN PHILOSOPHICAL SOCIETY 



vascular plexus either within the liver or in the haemal canal. It is to this elaboration of 

 the vascular system that the tunnies and bonitos owe their higher body temperature and 

 great speed and activity. 



While the beautiful color plates XIII, XIV, XV of Dr. Kishinouye's monograph 

 clearly reveal the marked advances in the vascular system in the bonitos and tunnies as 



myodomo*' 

 Fig. 193. Thunnui. Basal (B) and front views (A). 



