LIST OF ILLUSTRATIONS. 



FIG. PAGE 



1. The Common Frog, Kana temporana (front Ecker) . . . . 15 



2. Diagrammatic section of the posterior part of the Body . . -19 



3. General view of the Viscera 20 



4. Diagram of the Venous system . ...... 25 



5. Diagram of the Arterial system . ....... 29 



6. Dissection of the Heart ......... 33 



7. The Skeleton 41 



8. The Skull from the -ventral surface ....... 44 



9. The Skull from the right side ........ 46 



10. Diagrammatic section of the posterior part of the Head ... 48 



11. The superficial Muscles of the Hind-limb ...... 63 



12. The Nervous System 0/"Rana esculenta {from Ecker) ... 69 



13. The Brain, from the dorsal surface ....... 71 



14. The Brain, from the ventral surface 71 



15. Diagrammatic horizontal section of the Brain (from Ecker} . . 72 



16. Dissection of the Cranial Nerves of the right side .... 78 



17. Diagrammatic section of the Human Eye ...... 89 



18. Section of the wall of the Eye ........ 92 



19. The Internal Ear '. ......... 94 



20. Stages in the Development of the Frog . Between pages 98 and 99 

 2OA. Tadpole just hatched ...... To face page 100 



21. Segmentation of the Egg (from H addon] , . . . . .no 



