2O2 



Index. 



Slipper animalcule, 164. 

 Snail pond, 64. 



Shell, 64. 

 Snake, 95. 



Air sacs of, 98. 



Arteries of, 98. 



Bile sac of, 98. 



Cloaca of, 99. 



Dissection of, 97. 



External features, 96. 



Glottis of, 96. 



Gullet of, 98. 



Heart of, 98. 



Intestine of, 99. 



Kidneys of, 99. 



Liver of, 99. 



Lung of, 98. 



Ovary of, 99. 



Oviduct of, 99. 



Pancreas of, 99. 



Pericardium of, 98. 



Scales of, 96. 



Skin, preparation of, 99. 



Spermary of, 99. 



Sperm duct, 99. 



Spleen of, 99. 



Stomach of, 98. 



Teeth of, 97. 



Tongue of, 97. 



Ureters of, 99. 



Veins of, 98. 



Ventral plates of, 96. 

 Snout of fish, 70. 

 Songs of birds, 106. 

 Sounds made by grasshopper, 12. 

 Sow bug, 45. 

 Species, 20, 21. 

 Sperm duct of snake, 99. 



Receptacles of earthworm, 52. 



Sacs of earthworm, 51, 52. 

 Spermaries of crayfish, 43. 



Of fish ,75. 



Of frog, 87. 



Of hydra, 173. 



Of pigeon, 119. 



Of sea urchin, 188. 



Of snake, 99. 



Of starfish, 181. 

 Spicules of sea fan, 176. 



Of sponge, 169. 



Spider, 30. 



Web, 30. 

 Spinal bulb of fish, 79. 



Of frog, 88. 



Of mammal, 148. 

 Spinal cord of fish, 79. 



Of frog, 89. 



Of pigeon, 120. 



Of rabbit, 146, 147. 



Reflex action of, 89. 

 Spinal nerves of frog, 89. 



Of rabbit, 147. 

 Spines of fish, 70. 



Of vertebrae, 78. 



Of sea urchin, 187. 

 Spinnerets of spider, 31. 

 Spinning of spider, 30. 

 Spiracles of fly, 22. 



Of grasshopper, n, 13. 

 Spire of snail shell, 65. 

 Spleen of fish, 75. 



Of frog, 87. 



Of rabbit, 130. 



Of snake, 99. 

 Sponge, 168. 



Cilia of, 170. 



Simple, 169. 



Skeleton of, 168. 

 Spreading board, 6. 



Insects, 6. 

 Squash bug, 18. 

 Starfish, 177. 



Dissection of, 181. 



External features, 178. 

 Sternum of crayfish, 37. 



Of grasshopper, 13. 

 Sting of bee, 25. 



Stomach, glandular, of pigeon, 118. 

 Stomach of clam, 60. 



Of crayfish, 43. 



Offish, 75. 



Of frog, 86. 



Of rabbit, 129. 



Of sea urchin, 188. 



Of snake, 98. 



Of starfish, 181. 



Of turtle, 102. 



Stone canal of starfish, 182. 

 Stony corals, 174. 

 Striated muscle, 91. 



