12 ILLUSTRATIONS 



25. Dorsal View of the Human Tongue 112 



26. Vertical Section of a Fungiform Papilla 113 



27. Vertical Section of a Vallate Papilla 114 



28. Lateral View of a Catfish Showing Gustatory Branches of the 



Facial Nerve 116 



29. A Simple Taste-bud 117 



30. A Compound Taste-bud 118 



31. Taste-buds of the Rabbit 121 



32. Taste-buds of the Cat 122 



33. Taste-buds of the European Barbel 124 



34. Diagram of the Human Tongue Showing Innervation 125 



35. Diagram of the Possible Paths of the Gustatory Nerves in Man. ... 126 



36. Diagrams of the Human Tongue Showing the Distribution of the 



Four Tastes 149 



37. Diagrams of the Receptor Systems of the Vertebrate Chemoreceptors 181 



