INDEX 



719 



Sakis 489 



Salamander, 325, 396, 401, 404 

 Sdamandra, 399, 400 

 Salamandridae, 397, 404 

 Salientia, 396, 397, 404 

 Saliva, 516 



Salivary channel, 247 

 duct, 247 

 glands, 226, 516 

 Salmon, 395 

 Salmonidae, 379 

 Salmopercida, 395 

 Salt, inorganic, 17 

 Saltatoria, 263 

 Salticidae, 279 

 Sdticus, 111, 11^ 

 Salt-water animals, 5 

 communities, 645 

 San Jose scale, 259 

 Sandfly, 71, 262, 265 

 Sandpiper, 452, 461 

 Sandworm, 183, 184 

 Saprophytic chain, 635 

 Saprozoic nutrition, 512 

 Sapsucker, 456 

 Sarcodina, 31, 39, 40 

 Sarcophagida, 265 

 Sarcoptes, 275, 276, 279 

 Sarcoptidae, 279 

 Sartorius, 347, 348, 350, 467, 



505, 506 

 Saturniidae, 265 

 Sauria, 407, 430 

 Saville-Kent's anemone, 124 

 Sawfish, 375 

 Sawflies, 265 

 Scale, bird, 434 

 dermal, 378 

 fish, 388 

 insect, 264 

 mammals, 473 

 shark, 370 

 snake, 416 



Scallop, 282 



Scdopus, 482 



Scaly ant eater, 464, 496 



Scaphiopus, 404 



Scaphognathite, 207 



Scaphopoda. 282, 283, 300 



Scapula, 345, 437, 501 



Scarab, 250 



Scarabaeidae, 248, 264 



Scavengers, insects, 257 



Scent glands, 225, 474 



Sdiistosoma, 143, 145 



Schizogony, 69 



Schizont, 69 



Schleiden, 29 



Schultz, 376 



Schutze, 29 



Schwann, 29 



Sciatic artery, 337 

 nerve, 351 

 vein, 337, 338 



Scientific method, 11, 652 



research, 12 

 Scincidae, 407, 430 

 Scleritc, 230, 233 

 Scleroblast, 95, 98 

 Sclerocoel, 319 

 Scleropareida, 395 

 Sclerotic coat, 550 

 Scolex, 144, 146 

 Scolopcndra, 225, 226 

 Scolytidae, 264 

 Scorpion, 273, 274 



fishes, 395 



flics, 229, 260 

 Scorpionida, 268, 277 

 Scratching birds, 446 

 Screamers, 461 

 Screech owl, 453, 455 

 Scrotum, 342 

 Scud, 199 

 Sculpins, 389 

 Scurvy, 523 

 Scutes, 406, 408 

 Scutigera, 225 

 Scypha, 94-97, 101 



digestion, 96 



morphology, 94 



physiology, 96 



regeneration, 99 



reproduction, 97 



skeletons, 98 

 Scyphistoma, 122 

 Scyphozoa, 121, 122, 127 

 Sea anemone, frontispiece, 

 123, 125 



bass, 394 



cow, 487, 496 



cucumber, 304, 310 



dragon, 391 



ducks, 452 



fan, 128 



feather, 128 



gooseberries, 1 30 



horse, 379, 391, 395 



lamprey, 360-365 



lily, 304, 311 



pen, 128 



robin, 389 



serpent, 423 



slug, 292, 293 



snake, 407, 422, 423 



spider, 269 



squirt, 316 



turtle, 412, 429 



urchin, 304, 309, 310 



walnut, 1 30 

 Seal, 611 

 Seasonal coloration, 249 



dimorphic, 249 



polymorphic, 249 



sexually dimorphic, 250 



trimorphic, 249 

 Sebaceous gland, 474 

 Secretary bird, 461 



Secretin, 517, 554 

 Secretion, 20 



mucous, 179 

 Seed-eating bird, 446 

 Segment, 89, 171, 230 

 Segmentation, 192, 473 

 cavity, 82, 477 

 homonomous, 89 

 Segmented worms, 170-196, 171 



(see Lumbricus) 

 Segregation, chromosomes, 581 

 Selachiica, 376 

 Selection, 595, 649 

 Self-differentiation, 568 

 Self-fertilization, 80 

 Semen, 342 



Semicircular canals, 548, 549 

 Semilunar valve, 336, 530 

 Semimembranosus, 347, 348, 350 

 Seminal fluid, 342 



receptacle, 144, 154, 172, 173, 



180,212, 564 

 vesicle, 140, 151, 172, 180, 

 341, 342, 564 

 Seminiferous tubules, 341 

 Semitendinosus, 347, 348, 467 

 Sensations, 87, 547 . . 



appetite, 547 

 cold, 548 

 heat, 548 

 hunger, 547 

 pain, 548 

 pressure, 548 

 122, smell, 548 



taste, 355, 548 

 thirst, 547 

 touch, 547 

 Sense organs, 131, 180, 214 

 frog, 354 

 vertebrates, 547 

 Sensory cells, 105, 107, 108, 109, 

 178, 179, 318, 547 

 fibers, 178, 352 

 nerve, 352 



endings, 352 

 neurons, 178, 179, 352, 353 

 Septum, 123, 172, 173 

 Serial homology, 203 

 Serosa, 518 

 Serpen tes, 407, 430 

 Serratus, anterior, 505, 506 

 Serum, 335 

 Sesamoid bones, 467 

 Seta, 173, 174 

 tactile, 200 

 Seventeen-year locust, 242 

 Sex chromosomes, 582, 584 



linked, 584 

 Sexual dimorphism, 446 

 reproduction, 79, 103, 122 

 segments, 187 

 Shad, 395 

 Shaft, 435 

 Shark, 317, 324, 376 



