Sio 



INDEX. 



Spermatophoral gland, 217, 291 

 Spermatophore, Crayfish, 235 ; 



Snail, 277 

 Spermatozoid, Chara, 434, 440 ; 



Crayfish, 218; Earthworm, 246, 



Fern, 450, 458; Frog, 23, 154; 



Hydra, 344, 357 ; Mussel, 312 ; 



Snail, 277, 301 ; development 



of, 270 

 Sperm-capsule, 235 

 Sphenethmoid, 61, 63, 66 

 Spiculum amoris (see Dart) 

 Spinal cord, 11, 25, 30, 96 ; histo- 

 logy of, 140 

 Spinous process, 56 

 Spiral vessel, 446, 455, 464, 473 

 Spirillum, 408, 413 

 Spirochete, 413 

 Spirogyra, 396 — 407 

 Splanchnic cavity (see Pleuro- 



peritoneal cavity) 

 Spleen, 16, 40 



Spongy parenchyma, 465, 475 

 Sporangium, Fern, 444, 449, 456 ; 



Mucor, 420, 427 

 Spore, Bacteria, 409 ; Fern, 444, 



449' 457; Mucor, 421, 428; 



Penicillium, 417 ; Yeast, 380, 



386 

 Squamosal, 60 

 Stamen, 460, 477 

 Starch, 389, 398, 402, 433, 445 

 Stem, Bean, 460, 471 ; Chara, 430, 



436; Fern, 443 

 Sternal sinus, 226 

 Sternum, 192, 194 

 Stigma, 460 

 Stipule, 474 

 Stoma, Bean, 462, 464, 473 ; Fern, 



448, 456 

 Stomach, Crayfish, 178, 208; 



Frog, 15, 39, 46; Mussel, 320, 



338 ; Snail, 285 

 Stomodasum, 171, 303 

 Stoneworts, 430 — 441 

 Stratification, 404 

 Striated spindle, 185, 233, 234 

 Style, 460, 478 

 Sub-intestinal vessel, 245, 260 



Sub-neural vessel, 245, 260 



Sub-ocular arch, 63, 64 



Sub-tentacular lobe, 279 



Succinic acid, 383 



Suckers, 160, 162 



Sulphur, 379, 403 



Supporting lamella (see Meso- 



gloea) 

 Supra-branchial chamber, 307,3 1 8, 



337 



Supra-ilium, 72 



Supra-intestinal vessel, 245, 259, 

 260 



Supra-neural vessel, 245, 259 



Supra-scapula, 69 



Suspensorium, 13, 64, 65 



Swimmerets, 192 



Synangium, 18 



Symbiosis, 344 



Synangium, 18 



Synergidae, 479 



T. 



Tadpole, 5, 162 



Tail, 162, 165 



Tail fin, 162 



Tarsus, 73 



Teeth, Crayfish stomach, 178, 211, 

 212; Frog, 9, 15, 48 



Telson, 174, 190, 194 



Tendon, 74, 189 



Tendril, 474 



Tentacles, Hydra, 342, 348 ; de- 

 velopment of, 351 ; histology of, 

 349, 352 ; Snail, 273, 280, 299 



Tergum, 192, 194 



Testa, 479 



Testis, Crayfish, 217 ; Earthworm, 

 269 ; Frog, 23, 40, S3 ; histology, 

 153; Hydra, 357; Mussel, 312 



Thalamencephalon, 25, 98 



Thoracoabdominal linkwork, 202 



Thorax, 174 



Thread cells (see Nematocysts) 



Thymus, 24 



Thyroid, 24 



Tibia, 72 



Tongue, 9, 34, 44, 49 



Torula, ytf — 388 



Tradescantia, 441 



