INDEX 



471 



Relapsing fever, 361 

 Repair. See Regeneration. 

 Reproduction, 83, 91, 181 



in animals, 200 



in Cecidomyia, 203 



in ferns, 198 



in plants, 199 



in sponges, 197 

 Reproductive cells, 183 



system, development of, 123 

 Respiratory system, develop- 

 ment of, 143 

 Rhipicephalus boyis, 362 

 Rhizopoda, parasitism of, 338 

 Ribbert on transplantation, 428, 



432 



Rigidity, 36 

 Rigor mortis, 453 

 Romanes, 235 



on instinct, 170 

 Ross (Sir Ronald) on malarial 



parasites, 358 

 Rotifer, cilia of, 78 



mechanical stimulation of, 45 

 Rotifera, 341 

 Round worms, 340 

 Rous, 457, 458 

 Rusts, 335 

 Ruth, 457, 458 



SADLER on sex determination, 241 



Sarcocystis, 339 



Sarcopsylla penetrans, 345 



Sarcoptes scabiei, 333 



Scabies, 351 



Scar, 412 



Schenk on sex determination, 241 



Schistosoma hematobium, 354 



Schleicher, 102 



Schleiden, 93 



Schroeder, 25 



Schultze, 25 



Schwann, 25, 93, 214 



Scolex, 356 



Seat- worm, 354 



Segmentation cavity, 227 



of ovum, 217 

 Self-consciousness, 175 

 Senescence, 443 

 Setae, locomotor, 128 

 Sex determination, 240-248 



Sex determination, x-element in, 



245 

 Sexual organs, atrophic changes 



in, 449 



Shattuck, 323 



Shattuck and Ballance on carcin- 

 oma, 437 

 Sheep-scab, 351 

 Sheep-tick, 343 



Sherrington on reflexes, 167, 168 

 Sherrington's types of receptors, 



152 



Side-chain theory of Ehrlich, 380 

 Sight, development of, 159 

 Sitotrppism, 48 

 Situs inversus yiscerum, 240 

 Size of organisms, relation to 



complexity, 113 

 Skin, atrophic changes in, 449 

 Skm-grafting, 427, 429 

 Small-pox and vaccination, 391 

 Smell, development of, 163 

 Smut of corn, 335 

 Somatic cells, 203 



differentiation of, from ger- 

 minal cells, 119 



death, 452, 456 



Spallanzani, 25, 214, 407, 408 

 Special sense, organs of, 156 

 Specialization of cells, 110 

 Species, 309 



Spencer (Herbert) and evolution, 

 288 



on heredity, 250 



on instincts, 169 

 Spermatocytes, secondary, 206 

 Spermatogenesis, 204 

 Spermatozoa, 204 

 Spermatozoits, 359 

 Spermatozoon, locomotion of, 80 

 Spillman on Mendel's law, 271 

 Spina bifida, development of, 239 

 Spirem, 104 

 Spirillosis, 350 

 Spirochaeta duttoni, 350 

 Spirochaetes, 362 

 Spirogyra, 115 



conjugation in, 191, 192 

 Spleen, regeneration of, 416 

 Sponges, reproduction in, 197 



structure of, 120 

 Spongioplasm, 95 



