MEMUIKS OF THE iSATlO^AL ACADEMY OF SCIENCES. 



187 



Text-fig. ll.^THE LESSER AORTA AXU ITS KRANT'TIES, VIEWED FROM THE DORSAL SIDE. 



1, radial pallial artery. 



2, marginal pallial artery. 



3, arteries of nidamental filaiid. 



4, rectal arteries. 



5, intestinal artery. 

 (1, heart. 



7, gonaducal artery. 

 •H, genital artery. 

 9, right septa! arter>'. 

 10, accessory siphuneular artery. 



U, isiphnncular artery. 



12, left septal artery. 



13, common .septal artery. 



14, artery of pyriform .-^ac. 



15, posterior viscer(>-i)ericardial ajierture. 

 1(), dorsal aorta. 



17, lesser aorta. 



18, pallial artery. 



19, branchio-()S]ihradial artery. 



20, median pallial arteries. 



