(From the Physiological Laboratory, University College, London.) 



The Comparative Histology of the Suprarenal Capsules. 



By 



Swale Yincent, M.B. Lond., 



British Medical Association Eesearch Scholar. 



(With Plates XVI— XVIII.) 



Contents. 



page 



I. Introductory 282 



II. The Suprarenal Bodies in In- 

 vertebrata 284 



III. Acrania. Amphioxus . . . 285 



IV. Cyclostomata 285 



V. Pisces 287 



1. Elasmobranchii .... 287 



2. Ganoidei 292 



3. Teleostei 293 



4. Dipnoi 295 



page 



VI. 



Amphibia 296 



1. Urodela 296 



2. Anura 299 



VII. Reptilia 301 



VIII. Aves 305 



IX. Mammalia 307 



X. Depelopment of the Supra- 

 renal Capsules 312 



XI. Summary and Conclusions . 315 



Bibliography!) 319 



Explanation of the Plates . . . 325 



I. Introductory. 



In this paper au attempt will be made to give a review of the 

 minute structure of the suprarenal capsules in those groups of the 

 Animal Kingdom where they can be shewn to exist. 



I have previously described the anatomy and histology of these 

 organs in Pisces [116] and have also given a preliminary account of 

 their structure in Amphibia and Reptilia [11'^. Having been engaged 

 for some time in researches upon the comparative physiology and 



!) The numbers in square brackets throughout the text refer to this biblio- 

 graphical list. 



