LIST OF ILLUSTRATIONS 



no. I ' A1 ' 1 : 



1. Tracing showing the effect of intravenous injection of brain extract . 26 



2. Tracing showing the effect of intravenous injection of an extract of 



spinal cord ... 27 



3. Tracing showing the effect of intravenous injection of an extract of 



brain as compared with that of injection of choline in a dog after 

 administration of atropine . 



4. Tracing showing the effect of intravenous injection of an extract of 



brain as compared with that of injection of choline in a cat after 

 atropine 



5. Tracing showing the effect of brain extract and choline in a rabbit 



after atropine 



6. Tracing showing the effect of injection of a " protein " extract of 



striped muscle . ...... 29 



7. Tracing showing the effect of an injection of a saline decoction of 



striped muscle ......... 29 



8. Tracing showing the effect of injection of an alcoholic extract of 



brain .... . .... 30 



9. Islet of Langerhans from the splenic end of the pancreas of a dog . 43 



10. Section through the splenic end of the pancreas of a normal pigeon . 44 



11. Section through the splenic end of the pancreas of a pigeon after a 



few days' inanition . ...... 45 



12. Photograph of a series of uteri showing the effect of ovariotomy on 



the uterus . . . . ... . . .78 



13. Section through the ovary of Dattyurus viverrinus, showing Graafian 



follicles and corpus luteum ...... 



13a. Portion of corpus luteum of Dazyurus viverrinus, showing the 



glandular nature of the cells ...... 83 



14. Dissection of Scyllium canicula, giving a ventral view of " pi'.in-d 



suprarenals" (chromaphil bodies) and the interrenal (cortical body) 1 00 



15. Ventral view of kidneys and adrenal representatives of Raja batis . 101 



16. Tracing showing the effect of injection of an extract made from t he 



" paired supfarenal bodies " of Scyllium canicula . . .102 



17. Tracing showing the effect of injection of extract of interrenal body 



of ScyUium canicula . . . . . . . .103 



18. Kidneys and posterior cortical adrenal bodies (" corpuscles of 



Stannius ") of Pagelluf) centrodontus . . . . .104 



19. Kidneys and posterior cortical adrenal bodies (" corpuscles of 



Stannius ") of Oadus morrhua . . . . . .104 



20. Semi -diagrammatic figure showing the kidneys and their relations 



with the cardinal veins and the cortical and chromaphil tissues 



in Conger vulgaris ........ 105 



L'l. ' Pransverse section of the interrenal body of Trigon violaceus. . 106 

 22. Transverse section through one of the paired bodies of Torpedo . 1 <7 

 J i. Transverse section of a " corpuscle of Stannius " (" posterior 



interrenal ") of Salmo fario ....... 108 



24. Section of "bean of Salmo fario, showing an islet of 



cortical adrenal tissue ("anterior int* in nul"). . . . 109 



xviii 



