722 Index 



Rickets, 146, 233 



Ridge, 130 



Ring canal, 393, 395, 543, 546, 551 



stage of malaria, 365 

 Road runner, 625 

 Rock lobster {see Panulirus), 507 

 Rocky Mountain fever, 516 

 Rodentia, 628, 636-637 



classification, 44, 630 



digestive system, 130, 134 



excretory system, 190 



integumentary system, 87, 88 

 Rods of eye, 217, 218 

 Romalea microptera, 44, 521-527 

 Root, of nerve, 196, 203, 204 



of tooth, 86 

 Root-knot nematode {see Heterodera) , 



429. 430 

 Rostrum, 492 

 Rotifera, 347, 438-441 

 Round ligament, 261 

 Roundworm {see Nemathelminthes) 

 Royal jelly, 534 



pair, 532, 535 

 Royal Society of London, 266 

 Ruling reptiles {see Archosauria), 



603, 612, 613 

 Rumen, 132 



Ruminant, 131, 132, 133, 373 

 Running-water communities, 663 



Sabella, 454 



Saber-toothed tiger, 330 

 Sac, 152 



Saccoglossus, 556-558 

 Saccopharynx, 590 

 Sacculina, 507 

 Sacculus, 221, 223, 224 

 Sacral cord, 206, 207 



nerves, 204 



vertebrae, 105, 107 

 Sacrum, 107 

 Sagitta, 348, 554-556 

 Salamander. 46, 77, 166, 294, 567, 650 

 Salamandridae, 596 

 Saliva, 77, 131, 138, 139, 142 

 Salivary glands, 131, 137, 519, 524 

 Salmo, 590 

 Salmon. 587, 588, 590 

 Salpa, 561 

 Salts. 29;30 



ecological factor, 650 



iodized, 229, 230 

 Sand dollar, 45, 541, 542, 544, 550, 551, 



553 

 Sandfly, 359 

 Sandpiper, 624 



Sandworm {see Neanthes), 449, 450- 



453 

 Saprophagous, 429 

 Saprozoic, 350 

 Sarcodina, 352, 359-362 

 Sarcolemma, 116, 195 

 Sarcoplasm, 115, 126, 195 

 Sarcoptes, 515, 516 

 Sargassum fish, 592 

 Sauria, 606 

 Saurischia, 604, 613 

 Sauropod, 613 

 Sauropterygia, 603 

 Sawfish. 576, 580, 581 

 Sawfly, 539 

 Scale insects, 535, 539 

 Scales, 75, 83-85 



Scallop {see Pecten), 471, 476, 548 

 Scalopus, 633 



Scaly anteater, 85, 630, 632, 635 

 Scaphiopus, 596, 599 

 Scraphognathite, 498, 501 

 Scaphopoda, 468, 469 

 Scapula, 58, 101, 109 

 Sceloporus, 607 

 Schistosome, 415 

 Schistosomiasis, 415 

 Schizocoel, 447. 484, 487, 542 

 Schizogony, 363 

 Schizont, 363, 364-365 

 Schleiden, 266 

 Schwann, 266 

 Sciatic artery, 66 



vein, 67 

 Science, 17, 18 

 Scientific experiment, 19, 20 



law, 19 



method. 18-19 



name, 43-45 

 Sciurus, 630 

 Sclater, 340 

 Sclerite, 522 

 Scleroblast, 376 

 Scleroparei, 590 

 Sclerotic coat, 215, 216 

 Sclerotized, 487 

 Scolex, 416 



Scolopendrella, 490 • 

 Scomber, 588. 589. 590 

 Scorpion. 489, 513, 515 

 Scrotum, 240, 255, 256 

 Sculpin. 590 

 Scurvy, 146 

 Scutigera. 517 

 Scutigerella, 490 

 Scypha, 377, 381 

 Scyphistoma, 395 

 Scyphozoa, 386, 393-395 



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