INDEX — GLOSSARY. 



455 



Respiratory organs of crayfish, 1 16, 1 1' 

 of nereis, 115 



tree, 556 

 Response, in amoeba, 407 



in annelids, 409-411 



in hydra, 408 

 Retina, 379 



Retinal elements, 81, 380 

 Rhabdom, 384 

 Rhea, 650 

 Rhinoceros, 666 

 Rhizoids, 267 

 Rhizopoda, 509 

 Rhodophyceae, 248 

 Rhomboganoidea, 634 

 Rhythmical changes in plants 197, 



199 200 

 Rhynchocephalia, 642 

 Rhynchota, 585, 591 

 Ricciaceae, 268 

 Rice birds, 650 

 Rocks, decay of, 222 

 Rodentia, 652, 660 

 Rods, of retina, 380 

 Root, 7 



cap, 102 



hairs, 8, 68-69 



tip, 23 

 Roots, 37, 39 



aerial, 105 



of epiphytes, 106 



prop, 104 



storage, 103 



structure and function of, 68- 71 

 Rootstock, III 

 Rosette habit, 201 

 Rotatoria, 539 

 Rotifers, foot of, 539 

 Round-mouthed eel, 423, 627, 752 

 Round worms — thread worms, 540 

 Rudimentary organs, 794- 

 Ruminants, 666 

 Runner, 109 

 Rusts, 254, 749 



S — symbol for sulfur. 

 Saccharomycetes, 262 

 Sacculina, 560, 739, 760 

 Sacculus, 393, 394 

 Salamanders, 637, 639 

 Salamandra, 171 

 Salicornia, 37 

 SaHvary glands, 459, 720 



of insects, 579 



of man, 461 



of nereis, 455 

 Numbers refer to paragraphs; Black 



J Salmon, 636 

 Salvia, 461, 847 

 Samara, 159 

 Sand flea, 561 

 Saprophytes, 214 

 Saprozoic — nourished like fungi, i.e., on 



soluble organic matter. 

 Sarracenia, 53-55 

 Scale insects, 591, 763 

 Scale leaves, 114 

 Scales, 70 



bony, 348 



of vertebrates, 347 



of worms, 346 

 Scaly ant eater, 421, 652, 661 

 Schizocarp, 160 

 Schizophyceae, 232 

 Schizophyta, 226 

 Schizopoda, 561 

 Sclera, 379 

 Sclerenchyma — hard tissue, cells with 



thick walls. 

 Scolecida, 533 

 Scolex, 537, 755 

 Scorpion, 152 

 Scorpionidea, 567 

 Scyphozoa, 528 

 Sea anemone, 529 



chemical sense organs of, 367 

 respiration in, 476 



cow, 667 



cucumber, 556 



horse, 636 



lihes, 551 



squirt, 621 



turtles, 643 



urchins, 555 



weeds, 208 

 Seal, 652, 661 

 Seed, the, 148, 151, 292 



distribution, 166-168 

 Seedhng, 51 

 Seeds, 42-45 

 Segmentation, of body, 7,7,7,, 337 



of egg — cleavage, 190-195, 702 

 Selachii, 629 

 Selaginella, 290 

 Selaginellaceae, 290 

 Self fertilization, 144 

 Semicircular canals, 393, 394 

 Sense of position, 365 



of smell, 366 

 of insects, 369 

 of man, 373 

 of vertebrates, 370 



of taste, 366 

 Face numbers refer to figures. 



