The comparative Histology of the Suprarenal Capsules. 303 



The above description applies to Uromastix Harchvichii, but may 

 be considered as fairly typical of the Reptilia generally. Desci^iptions 

 of several other species and drawings of some few will be found in 

 an earlier paper [11?']. 



The medulla, then, in the Reptilia is for the most part arranged 

 side by side with the cortex along the dorsal aspect of the organ, 

 but there is already a commencement of that intimate intermingling 

 of the two which is so characteristic of Aves. 



Braun [11] describes transition forms of cells between nerve-cells 

 and medullary suprarenal cells in certain lizards. I have not succeeded 

 in verifying this, but I consider it probable that such forms are present. 



(To be continued.) 



