Ihe Comparative Physiology of the Suprarenal Capsules. Wl 



Fig. l. 



Doe/, 7-zK. 

 y fcrp1ria % atropim . 



Carotid rat rr 



St anal 



Injected tcc.qfejctmct (tf paired segmental 

 suprg.ren.als (SvylLcatuitn 25. 



Tii in tracing (seconds.) 



all point to the fact that the " paired segmental " suprarenal bodies 

 of Elasmobranchs correspond precisely in physiological action to the 

 medulla of mammalian suprarenal. 



With extracts of the interrenal body of Elasmobranchs, partial 

 effects only in the same direction are obtained. Pig. 2 shows a 

 tracing obtained by injecting the same amount of " interrenal " as 



VOL. LXl. p 



