INDEX 



643 



Rumen, 441 

 Ruminants, 441, 448 



stomach, 438 

 Running birds, 414 

 Running insects, 278 



S 



Sabellids, 248, 249 

 Saber-toothed tiger, 661 

 Sacculina, 626 

 Sacculus, 336, 337, 368 

 Sacral vertebrae, 326 

 Sacrum, 319, 647 

 Sagitta, 188, 475 

 Sagitta hexaptera, 188 

 Salamanders, 340, 370, 371, 375 



embryo, 648 

 Salientia, 370, 372 

 Salinity, 531 

 Saliva, 327 



Salivary glands, 99, 327 

 Salmon, 361, 362, 530 



brain, 367 



tail, 366 

 Salts, 8, 21, 34, 39, 482 

 Samia cecropia, 498 

 Sand dollars, 204 

 Sandpipers, 414 

 Sandworm, 247 

 Sanitation, 520 

 Saprophytic types, 80 

 Sarcode, 19 



Sarcodina, 78, 81, 82, 88 

 (iSee also Rhizopoda) 

 Sarcoplasm, 102, 180 

 Sarcoptes scabiei, 307 

 Sauropsida, 382 

 Sawfish, 347 

 Scab mites, 308 

 Scabies, 308 



Scala tympani, 336, 337 

 Scala vestibuli, 336, 337 

 Scale insect, 294 

 Scale lice, 294, 295 



Scales, 54, 324, 350-354, 385, 386, 391, 399, 437 

 Scallops, 225, 230 

 Scaphognathite, 255, 258 

 Scaphopoda, 221, 225, 541 

 Scapula, 325, 327, 400 

 Scarlet fever, 520 

 Scent glands, 424 

 Scents, animal, 492 

 Schistocerca americana, 276 

 Schleiden, 32, 583 

 Schwann, 32, 583 

 Schultze, Max, 19, 32, 583 

 Sclater, P. L., 534 

 Scleroblasts, 132 

 Sclerotic layer, 338, 339 

 Scolex, 169, 171 

 Scolopendrn, 274 

 Scolytid beetle, work, 290 

 Scorpions, 306-307, 538, 542 

 Scutes, 390, 391 



Scutigera, 274, 276 

 Scyllium canicula, brain, 346 

 Scyphistoma, 161, 152 

 Scyphozoa, 145, 146, 147, 541 

 Scyphozoan jelly fish, 147 



life history, 151 

 Sea anemones, 145-147, 266, 523, 624 

 Sea angels, 224 

 Sea cucumbers, 204, 209 

 Sea fans, 145, 148, 149 

 Sea lilies, 205, 209, 210 

 Sea lions, 437 

 Sea mats, 190 

 Sea moss, 190 

 Sea pens, 145, 148, 149 

 Sea slugs, 225 

 Sea snakes, 396 

 Sea squirts, 317 



Sea urchins, 113, 204, 206, 207, 208, 210, 466, 541 

 Seals, 437 



Seasonal changes, 505, 510 

 Sebaceous glands, 100, 324, 424 

 Secretary bird, 534 

 Secretin, 459 



Secretion, 33-37, 65, 99, 104, 328, 329, 491-493 

 Secretions, 29, 36-37, 98, 99, 163, 241, 273, 292, 

 304, 317, 327, 329, 341, 366,413, 467, 491-493 

 Secretory epithelial cells, 100 

 Sedgwick, Adam, 274 

 Segmentation, 122 



cavity, 121, 122, 124 

 (See also Blastocoel) 

 Segments, 52 

 Segregation, 558-563 

 Self-fertUization, 108, 143, 223, 470 

 Self-regulatory tendency, 517 

 Semicircular canals, 336, 337, 342, 347, 376 

 Semilunar ganglion, 334 

 Seminal groove, 235 



Seminal receptacles, 168, 169, 240, 263, 303 

 Seminal vesicles, 162, 163, 168, 240 

 Semipermeable membrane, 12 

 Senescence, 44, 45, 460-462 

 Senility, 461 



Sensations, 337, 338, 496 



Sense organs, 106, 151, 189, 201, 217, 223, 226, 

 248, 334-340, 347, 359-360, 375, 473, 496 



auditory, 277-278, 336, 337, 407, 427-428 



equilibrium, 261 



lateral line, 362 



olfactory, 336 



sight, 261, 338, 339 



tactile, 272 



taste, 336 

 Sensory cells, 138, 139 

 Sensory epithelium, 98 

 Sensory fibers, 333 

 Sensory papillae, 260 

 Sepia, eye, 227 

 Serous secretion, 467 

 Serpent stars, 204, 205 

 Serpula vermicularis, 249 

 Sertularia, 146 

 Serum, 330 

 Servetus, 581 



