382 



INDEX 



Whales, 160, 162 

 White corpuscles, 193 

 White fibrous tissue, 173 

 Wing pads, 122 



Wings, Bee, 125 ; Grasshopper, 116 

 Worker, Bee, 124 

 Worker-cells, 135 



Worms, segmented, 81 {see Earth- 

 worm) 

 Wound healing, 201 

 Wrist, 166 



Yeast, 13 

 Yolk plug, 225 



Zoology, 3 



Zygapophysis, 179 



Zygote, 37, 109 {see Fertilization) 



Zymase, 13 



