INDEX 



Pinna, p 1X1. 



Pinnate, P 74. 



Pinnatifid, p 76. 



Pistil, p 135. 



Plantain, p 157. 



Plant societies, p g. 



Plants, unlikencss of, P 9. 



Plastron, A 14 1. 



Pleura, h 76. 



Plexus, H 128. 



Plumule, P 20, 23, 25. 



Plur-annual, P 18. 



Pod, p 164. 



Poison, H 137. 



Pollen, p 135, 144, 180, A 85. 



Pollen basket, A 88. 



Pollination, p 144, 145; artificial, p 



Polyp, a 9, 22, 125. 



Polypetalous, p 134. 



Polysepalous, P 134. 



Polytrichum, p 199. 



Pome, p 169. 



Portal vein, H 105. 



Portuguese man-o'-war, A 28. 



Posterior curvature of spine, H 37. 



Potato, H 92, 95, 112; bug, A 90. 



Practical questions, H 50, 69, 87, 



136. 

 Primates, A 220. 

 Primitive man, H 3. 

 Primrose, p 149. 

 Proboscis, of butterfly, A 83, 



elephant, A 207. 

 Prolegs, A 84, 87. 

 Propagation by buds, P 121. 

 Prop-roots, P 36. 

 Protection of birds, A 171. 

 Protective resemblance, a 34, 146. 

 Proteid, xi, H 88, 91, 92, 94, 95, 96, 

 Proterandrous, p 146. 

 Proterogynous, p 146. 

 Prothallus, p 178, 202. 

 Protoplasm, xiv, P 42, 94, 97, 



A 6, 11, H 5, 6, 59, 106, 118. 

 Protozoa, A 7, 9, 11, 125. 

 Pruning, p 105. 

 Pseud-annual, P 17. 

 Pseudoneuroptera, A 82. 

 Pseudopod, A i i. 

 Pteridophytes, p 181, 201, 203. 

 Ptyalin, H 100. 

 Puffball, p iQ 4 . 

 Pulse, H 55. 

 Pure food law, h 93. 

 Pylorus, H 103. 

 Pyxis, P 166. 



153- 



87; 



185, 



Quarantine, H 163. 

 Quarter-sawed, P 70. 

 Quill, A 156. 



Rabbit, A 205, 223. 



Radial symmetry, a 34, 125. 



Ration, daily, H 94, 96. 



Rattlesnake, a 145. 



Reaction, h 151, 152. 



Receptacle, p 134, 163. 



Rectum, A 134, H 97. 



Reflex action, h 121. 



Regeneration of lost parts, A 37. 



Rennin, H 103. 



Reproduction, A 12, 15, 20, 25, 37, 



46, 120. 

 Reptiles, A 139. 

 XBespiration, cellular, H 81; human, 



H 70; hygiene of, H 807 in plants, 



p 97, 103. 

 Resting spore, p 184, 185, 189, 191, 



192. 

 Retina, H 151, 152. 

 Rhizome, p 52, 202. 

 Rhizopoda, A 16. 

 Road runner, A 169. 

 Robin, A 183. 

 Root cap, p 44. 

 Root climber, p 129. 

 Root hairs, p 41, 42, 46. 

 Rootlet, p 41. 

 Root pressure, P 99, 104. 

 Roots, and air, p 41; forms of, P 32; 



function, p 38; structure, P 38, 43; 



systems, p 32. 

 Rotifer, A 49. 

 Round worm, A 49. 

 Ruminant, A 213. 

 Rust, P 192. 



Salamander, A 134, 138, 139. 



Saliva, H 96, 100, 112. 



Salt, x, H 93. 



Samara, p 164. 



Sand, xiii. 



Sandworm, A 49. . 



Sanitary map, H 158. 



San Jose scale, A 95. 



Sap, p 67. 



Saprophyte, P 107, 108. 



Scab in sheep, A 93. 



Scales, of bird, A 161; fish, A no; 



moth, A 89. 

 Scallops, a 104. 

 Scape, p 161. 

 Scarab, a 90, 91. 



