Mr. S. Vincent. 



Dog, r-zE. 



Jan.zr, mr. CHel 3 . 



Morphia (Jmueofsol. igr. in 6 mm.) 



A tropineC 3 mm. of i % sol .) 



Signal. 



Injected 1 cc of eoc tract of interrenal 

 (ScylliuW'Caiiicula ), Jin 25. 



Time tracing (seconds). 



was used of " segmental suprarenal " in fig. 1. There is a striking 

 difference between the two results. 



With extracts of the suprarenals of Teleosts no effects whatever are 

 produced. Fig. 3 shows a blood-pressure curve unaffected by the 

 injection of extract of suprarenals of eels to the same amount as was 

 previously employed in other experiments. Subsequent employment 

 of mammalian suprarenal extract in the same experiment produced 

 its proper effect. 



Thus we have negative evidence of a physiological character that 

 the interrenal body of Elasmobranchs corresponds to the " corpuscles 

 of Stannius," the known suprarenal bodies in Teleosts, a conclusion 

 both Diamare (5) and I myself (5, 17) had arrived at from anatomi- 

 cal and histological considerations. 



