INDEX. 



309 



Nervous system, of sparrow, 235. 



of starfish, 271. 



of turtle, 185. 



of worm, 136. 

 Nest, of bumblebee, 67. 



of paper wasp, 72. 

 Nucleus, 15, 18, 20. 

 Nutrition, in amoeba, 16. 



in hydra, 30. 



in insects, 93. 



in mussel, 150. 



in vertebrates, 260. 

 Nymph, 46, 96. 



Odonata, 42-48. 

 Order, 104. 

 Organ, 32. 

 Orthoptera, 48-57. 

 Ovum, 29. 



Palate. See Mouth. 



Pallial line, 149. 



Pancreas. See Digestive organs. 



Paper wasp, 72. 



Paramecium, 18. 



Passer, 211. 



Pectoral arch. See Shoulder girdle. 



Pelvic girdle, of fish, 166. 



of frog, 193. 



of rabbit, 258. 



of sparrow, 234. 



of turtle, 207. 



Pericardium. See Circulatory or- 

 gans. 



Peristome, 20. 

 Pharynx, 165, 242. 

 Piscus, 161, 178. 

 Plastron, 204. 

 Plumage, 218. 



Proboscis. See Mouth parts. 

 Pronephros, 169. 

 Protozoa, 12, 21. 

 Pseudemys, 198. 



Rabbit, 237. 



Radius. See Arm bones. 



Radula, 157. 



Rana, 178. 



Reagents, 276. 



Reproduction, in amoeba, 17. 



in hydra, 31. 



in insects, 96. 



in starfish, 273. 



in vertebrates, 262. 



vegetative, 27. 



Reproductive organs, of crawfish, 

 121. 



of fish, 167. 



of frog, 182. 



of grasshopper, 53. 



of hydra, 27, 29. 



of mussel, 148. 



of starfish, 269. 



of turtle, 202. 



of worm, 135. 

 Reptilia, 198-211. 

 Respiration, in amoeba, 16. 



in cyclops, 127. 

 Respiratory organs, of crawfish, 116. 



of fish, 170. 



of grasshopper, 53. 



of insects, 94. 



of mussel, 151. 



of rabbit, 249. 



of snail, 156. 



of snake, 210. 



of sparrow, 222, 224. 



of spider, 108. 



of turtle, 203. 

 Rib, 176, 205, 231, 254. 

 Robber fly, 85. 

 Rostrum, of bugs, 58. 



of crawfish, 114. 



Scapula. See Shoulder girdle. 



Schistocera, 52. 



Segmental organ. See Nephridium 



of worm. 



Segmentation, of arthropods, 39, 

 113, 133, 134. 



of oosperm, 158, 196. 

 Sensation, in amoeba, 18. 



in hydra, 32. 



in insect, 98. 



in mussel, 153. 



in vertebrates, 263. 

 Serial homology, 123. 

 Setae, 132. 

 Shell, of mussel, 148. 



of snail, 155. 



of turtle, 203. 

 Shoulder girdle, of fish, 166. 



of frog, 192. 



of rabbit, 257. 



of sparrow, 233. 



of turtle, 206. 

 Siphon, 144. 

 Skeleton, of crawfish, 114, 122. 



of fish, 175. 



of frog, 191. 



