INDEX. 



307 



Excretory organs, of crawfish, 122. 



of fish, 169. 



of frog, 182. 



of grasshopper, 54. 



of mussel, 147. 



of rabbit, 246. 



of sparrow, 225. 



of turtle, 202. 



of worm, 136. 

 Exoskeleton, 204, 217. 

 Eye, of crawfish, 119. 



of fish, 172. 



of insects, 39. 



of snail, 156. 



of starfish, 269. 



Family, 103. 



Feathers, 218. 



Feeding, of amoeba, 14, 15. 



of bumblebee, 63. 



of butterfly, 37. 



of crawfish, 112. 



of dragon fly, 43. 



of earthworm, 130. 



of fly, 80. 



of frog, 180. 



of grasshopper, 49. 



of hydra, 26. 



of paramecium, 21. 



of rabbit, 238. 



of sparrow, 213. 



of squash bug, 58. 



of starfish, 270. 

 Fertilization, 30. 

 Fins, 162, 166. 

 Fish, 161. 

 Foot, of frog, 192. 



of insect, 41. 



of mussel, 142. 



of rabbit, 240. 



of snail, 155. 



of sparrow, 214. 



of spider, 108. 



Foramen magnum. See Skull. 

 Fresh- water sponge, 22. 

 Frog, 178. 



Gastrula. 159. 

 Gemmules, 23, 280, 281. 

 Genus, 102. 

 Gill, of crawfish, 120. 



of fish, 170. 



of mussel, 144. 

 Glochidia, 152. 

 Glottis. See Larynx. 



Grasshopper, 48. 

 Green gland, 122. 



Harvest fly, 59. 



Haunts and habits, of amoeba, 278 



of asellus, 125. 



of back-swimmer, 61. 



of bee killer, 85. 



of beetles, 77-79. 



of blister beetle, 74. 



of bumblebee, 63. 



of butterfly (cabbage), 86. 



of butterfly (sulphur), 36. 



of catfish, 161. 



of centiped, 109. 



of cicada, 59. 



of crawfish, 111. 



of cyclops, 126. 



of dragon fly, 42. 



of earthworm, 131. 



of fly, 80. 



of frog, 178. 



of grasshopper, 48. 



of hydra, 282. 



of mussel (river), 140. 



of paramecium, 279. 



of rabbit, 237. 



of snail (pond), 154. 



of sparrow, 212. 



of spider, 105. 



of sponge (fresh- water), 279. 



of squash bug, 57. 



of starfish, 266. 



of turtle, 198. 



of wasp (mud) , 70. 



of wasp (paper), 72. 

 Head, of blister beetle, 75. 



of bumblebee, 64. 



of butterfly, 39. 



of dragon fly, 74. 



of fish, 162. 



of fly, 81. 



of grasshopper, 49. 



of larva, 90. 



of pupa, 92. 



of sparrow, 215. 



of turtle, 199. 



Heart. See Circulatory organs, 

 Hemiptera, 57, 62. 

 Hermaphroditism, 30. 

 Hinge ligament, 141. 

 Homology, 45, 123. 

 Honeybee, 73. 

 Hydra, 26, 282. 

 Hymenoptera, 63, 74. 



