INDEX 



349 



Sternal sinus, 203. 



Sternum, 194*, 195, 238. 



Stigma, 83*, 84, 93. 



Stimuli, 1 6, 53, 101, 178; external, 16, 

 73, 78; interference of, 78*, 188; in- 

 ternal, 16; localized, 130, 132; non- 

 localized, 130, 132. 



Sting, 239*, 254; feeler, 239*. 



Stomach: Crayfish, 195*, 200; Honey- 

 bee, 240, 241*. 



Stomatogastric ganglion : Crayfish, 205 ; 

 Honeybee, 244, 245. 



Strainer, 201. 



Strasburger, 36. 



Striation, on cuticle of Earthworm, 167 : 

 Euglena, 82, 83*; Paramecium, 61*. 



Struggle foE existence, 283-284. 



Subintestinal blood vessel, 173. 



Submentum, 235. 



Subneural blood vessel, 172*, 173. 



Suboesophageal ganglion, 205, 244. 



Subpharyngeal ganglion, 177*. 



Supporting tissue, 101*. 



Supraintestinal blood vessel, 173. 



Suprapharyngeal ganglion, 177. 



Surface tension, Ameba, 42. 



Swarming, Honeybee, 258. 



Swarm spore, 95*, 96, 113. 



Swallow, 300. 



Swimmeret, 196*, 198, 199. 



Sycon, 149, 152. 



Symbiosis, 143*, 297-298. 



Symmetry, 4, 5, 6, 7, 158, 159. 



Sympathetic nervous system, 244, 245. 



Systematic zoology, i ; historical, 269 

 270. 



Tapeworm, 158. 



Tapir, 279. 



Tarsus, 236*. 



Taste: Crayfish, 222; Honeybee, 247*. 



Telophase, of mitosis, 30*, 31. 



Telson, 195*. 



Tendon, 101. 



Tentacle, Hydra, 116, 117, 118*, 120*, 



123-124, 125. 

 Tergum, 194*, 238. 

 Termite, 300. 

 Testis: Ascaris, 161 ; Crayfish, 210*; 



Earthworm, 181*, 182; Honeybee, 248, 



249*; Hydra, 118*, 119, 134, 135*; 



Planaria, 154*, 156. 



Thermotropism, 53: Ameba, 55-56; 



Hydra, 131 ; Paramecium, 76-77, 78. 

 Thigmotropism, 53: Ameba, 54*~55*; 



Crayfish, 222-223 ; Earthworm, i6- 



187; Hydra, 130-131; Paramecium, 



76*. 



Thorax, 236. 

 Tibia, 236*. 

 Tick, 6. 

 Tissue, epithelial, 100-101*; connective, 



ioi*; muscular, 101*; nervous, 101- 



102; supporting, ioi*. 

 Tongue, 235, 247*, 257. 

 Touch: Crayfish, 222; Honeybee, 248 

 Tower, W. L., 295. 

 Toxopneustes, 104. 

 Trachea, 243*-244. 

 Tracheata, 225. 

 Trematoda, 158. 

 Trembley, 133, 137. 

 Trial and error, in behavior, 77, 86* p 



131- 



Trichina spiralis, 163*. 

 Trichinosis, 163. 

 Trichocyst, 60, 62*, 63*, 81. 

 Triploblastic, 4, 5, 6, 7, no, 154, 159. 

 Trochanter, 236*. 

 Trophoplasm, 288. 

 Tropism, 53. 



Trypanosoma gambiense, 82. 

 Trypsin, 170. 

 Tunicata, 6, 7. 

 Turbellaria, 158. 

 Tyndall, 9. 



Typhlosolar blood vessel, 172*, 174. 

 Typhlosole, 166*, 169. 



Undulating membrane, 62, 66*, 67. 

 Uniramous appendage, 196*. 

 Urea, 14, 50. 



Urinary tubule, 241*, 242. 

 Uropod, 199. 



Uterus: Ascaris, 161*; Planaria, 154* 

 156. 



Vacuole, contractile: Ameba, 37*, 38, 39- 

 41, 40*; Chlamydomonas, 92*, 93; 

 Euglena, 81, 82, 83*; Paramecium, 

 60, 63-64*, 67, 68; Vohox, 97. 



Vagina: Ascaris, 161*; Honeybee, 249*, 

 250; Planaria, 154*, 156. 



Valve, 174, 175, 203, 242. 



