INDEX 



515 



Spermatophores, of cephalopods, 480. 



Spermatotheca, 479; of lobster, 479. 



Spermatozoa, 425; types of, 427. 



Spider, eyes, 239. 



Spinax, light organs, 134. 



Spindle, 25. 



Spindle fibrils, 25. 



Spine, of Echinoderms, 377; of porcupine, 

 385- 



Spinning gland, of Lepidoptera, 416. 



Spinning tissues, 409. 



Spireme, 23. 



Spleen, 170. 



Sponge, muscle cell on water pore, 102; sup- 

 porting cells, 61. 



Spongioplasm, 3. 



Spores (reproductive cells), 418. 



Static power, by gravity, 207, 212; spatial, 

 207, 212. 



Static tissues, 207; of Cephalopoda, 211; of 

 Crustacea, 208; of Cyclas, 210; of Insecta, 

 21 1 ; of medusas, 209 ; of Vertebrata, 212. 



Stigmata, 227. 



Stimulus, nerve, 174, 177. 



Sting, of ground-hornet, 379. 



Stratification, of epithelium, 364. 



Strombus, eye of, 244-245. 



Sulcus spiralis, 222. 



Supporting tissue, 56, 58; of chestnut, 58. 



Supporting tissues, higher forms, 67 ; simple 

 forms, 57. 



Sus, nerve-ending in snout, 201 . 



Sweat glands, of mammals, 398. 



Sycotypus, cardiac muscle, 93; nephridial 

 tissue, 346; neuroglia, 198; nidamental 

 tissue, 483; olfactory tissue, 266. 



Synapsis, 461 ; 469. 



Synizesis, 461 ; of reproductive chromosomes, 

 425 ; of reproductive cells, 424. 



Synovial fluid, 398. 



Synovial membrane, of cat, 398. 



Tactile cells, 200. 



Tactile nerve-endings, with capsules, 202-204 ; 



in conjunctiva of man, 203; simple forms, 



201 ; of Herbst, 204. 

 Tail, of spermatozoa, 429. 

 Taxonomic series, 13. 

 Tear gland, of mouse, 397. 

 Technic, 502; outline of, 502. 

 Teeth, of Acanthias, 291-294; of Seserinus, 



289. 

 Telosynapsis, of reproductive chromosomes, 



425. 



Tendon, cow, 63. 

 Terminal bars, 43, 360. 

 Terrapene, stink gland, 402 

 Testis, 419. 

 Tetrads, 462. 



Tetramitus, 6. 



Tetronarce, chromatin knot, 8; histogenesis of 



electric tissue, 114; nerve cell, 180. 

 Thallassophryne, poison gland, 384. 

 Thelytoky, 474. 

 Thymic lymphocytes, 310. 

 Thy mus gland, 304 ; of cat, 309; of frog, 310; 



of man, 310. 



Thyroid gland, 304; of fish, 311. 

 Tonsil, 304; of opossum, 307. 

 Touch, tissues of, 200. 

 Tracheal tube, of insect, 325. 

 Transportation, of spermatozoon, 427. 

 Trichocysts, of Infusoria, 375. 

 Triodopsis, lung, 323. 

 Trophospongia, 12. 

 Tropidonotus, olfactory cells, 261. 

 Turbellarian, blood vessels, 150. 

 Tympanum, 215, 223. 



Umbilical cord, sheep, 61. 

 Umbilicus, of feather, 368. 

 Unio, mitosis of, 33-37; nephridial tissues, 



354; static tissue, 210. 

 Ureter, 344. 

 Urethra, 344. 

 Utriculus, of vertebrate ear, 220. 



Vacuole, 9; food, 279. 



Vampyrella, pigment of, 273. 



Vanadis, eye of, 243. 



Vas deferens, 437. 



Vaso-formative cells, 162. 



Veins, 149. 



Venus, 100. 



Vespertillo, mucous glands, 294-295. 



Visual cells and tissues, 224. 



Visual tissues, of arthropods, 234-240; tetra- 

 branch cephalopods, 253; of coelenterates, 

 230231; of echinoderms, 228, 233; of 

 mollusks, 244-253; of plecypod mollusks, 

 227; of planarians, 231 ; of Protozoa, 226; 

 vertebrates, 253-257; of worms, 241. 



Vital law, 4. 



Vitelline membrane, 467. 



Volvox, 14, 1 6, 17. 



Vorticella, contractile stalk, 102. 



Wandering cells, 343. 

 Wood cells, 60. 



Yolk membranes, of bird, 500; of fish, 501. 

 Yolk nucleus, of Felis, 470 ; of Limulus, 460 ; 

 of Lophius, 460; of Pholcus, 460. 



Zona radiata, 456. 

 Zygote, 461. 



