INDEX. 



325 



Statoblasts, Urnatella, 252, 255 

 Staurastrum, 71, 72, 82 



furcigerum, 82 

 ■ gracile, 83 

 macrocerum, 83 

 punctulatura, 82 

 Stauroneis, gi, 96 



phoenocenteron, 97 

 Stentor, 148, 156 



Barretti, 157 

 caerulens, 158 

 igneus, 158 

 key to species, 156 

 niger, 158 , 

 polymorphus, 157 

 Stephanoceros, 213, 221, 223 

 Stephanops, 222, 233 

 Strephuris 201, 207 

 Stylonychia, 149, 163 

 Sugar crystals, 293, 307 

 Surirella, gi, 95 



gemma, 95 

 splendida, 95 

 Sword-bearer, 235 



Tardigrades, 287 

 Tartaric acid crystals, 307 

 Tetmemorus, 71, 80 



Brebissonii, 81 

 granulatus, 80 

 Thistles, 306 

 Touch-me-not (Impatiens fulva), 



306 

 Trachelocerca, 148, 161 

 Tradescantia, raphides in, 306 

 Trembley on Hydra, i6g 

 Trich6dina, peduculus, 170 

 Trifolium, crystals in, 307 



Trinema, 115, 129 



enchelys, I2q 

 Triplets, French, I2 

 Triploceras, 72,- 84 



verticillatum, 84 

 Tube, glass dipping, 32 

 Tubifex, 202, 209 

 Turbellaria, 174, 176, 193 



American naturalists 

 on, ig6 



cilia of, 174, 193 



food, 195 



mouth, 194 



reproduction, 195 

 Turn-table, 2g 



U 



Unio, 284 

 Urnatella, 244, 249 



reproduction of, 255 

 Utricles of Utricularia, quadri- 

 fid processes, 53 

 structure, 52 

 Utricularia vulgaris, 51 



method of capturing 

 food, 52 

 Uvella, 148, 160 



Vaginicola, 148, 154 

 Vallisneria, 57 



cyclosis in, 57 

 Vampyrella, 114, 117 



lateritia, 117 

 Vaucheria, 102, 106 

 Vinegar eel, 197 

 Virginia creeper, 306 

 Volvox, 68, gg 



globator, gg 



