INDEX 



943 



Reniceps, internal anatomy, 440 



tiburo, 422, 439 

 Renilla, 144 

 Rennin, 385 

 Reproduction, 54 ^ , oo . 



and life cycle, starfish, 234 ^ 



and life history, chicken, bio 



asexual. 111, 153 



in cat, 652 

 Reproductive function, 4U( 



system, frog, 531 

 Reptiles, classification, 54* 



flying, 546 



fossil, 546 

 Reptilia, 411 



class, 545 

 Resources, nonrenewable, 7 9 4 



renewable, 794 

 Respiration, aerial, 392 

 Respiratorj' system, 110 

 chicken, 603 

 frog, 514 

 phrynosoma, obb 

 vertebrates, 390 

 tree, 223 



Rlltomtion^'of^ natural resources, 794 



Rete testis, 572 



Reticulitermes hesperus, 3^0 



Reticulum, 633 



Retina, 401, 529 - 



Retinella indentata paucilirata, 24U 



Retinula, 276 



Retortamonas, 67 



Retractor muscles, 224, 2^0 



Rhabdamina, 69 



Rhabdocoelida, 160 



Rhabdom, 276, 277 



Rhabdopleura, 361, 364 „,,,^i„ ro. 



Rhachianectes glaucus, gray whale, 634 



Rhagon, 124, 125 



Rheas, 585 



Rheiformes, order, 585 



Rheotropism, 77 



Rhincocephalia, order, 560 



Rhinoderma, frog of Chile, 480 



Rhizocrinus, 225 



Rhizopoda, 67 ,. ^. .„ , 



Rhomaelia microptera. digestive system 



350 

 reproductive system, 353 

 Rhopalocera, suborder, 325 

 Rhyacotriton olympicus, 484 

 Rhynchites bicolor, 324 

 Rhynchocephalia, 869 



order, 548 

 Riboflavin, 389 

 Ricord's frog, 472 

 Ring canal, 223, 230 

 Roaches, 313 

 Robber flies, 330 

 Robins. 595 

 Robler frogs, 40 

 Rock rollers, 321 ,^ , . „„ 



Rocky Mountain spotted fever, SO 



Rodentia, order, 621 



Roe of starfish, 235 



Roentgen, 698 

 radiation, 702 



Roman scholars, 36 



Ross, Major Ronald, 79 



Rostellum, 763 



Rostrum, 268, 427 



Rotifers, 27, 188 



Roundworms, 26, 175 



Rugae, 564 



Rumina decoUata, 238 



Ruminants, 632 



Sable, Russian, 638 



Sacculina, 265, 284, 74 (, 768 



Sacculus, 403, 530 



Sacrum, 380 



Sagartia, 140 



Sagebrush formation, t ^t 



jack rabbit biome, 726 

 Sagitta hexaptera, 192 

 Sailfishes, 453 ,^ , , „,„„^ 



Salamander, blind cave (Typhlomolge), 



482 

 Salamanders, 411, 472 

 Salamandra salamandra, 4i9 

 Salamandroidea, suborder, 484 

 Salientia, order, 485 

 Salinity of ocean, 767 

 Salmon, 447, 448 

 Salmonidae, family, 448 

 Salpa, 361 . 

 Salticus senicus, 296 

 Salts, inorganic, 58 

 Sand cricket, 315 

 dollar, 222 

 fleas, 265 

 Sandpipers, 591 

 Santonin, 183 

 Saprophytic, 66 



nutrition, 82 

 Sarcode, 49 

 Sarcodina, 67 



Sarcolemma, 106 „ 



Sarcoptes scabiei, itch mite, i6b 

 Sarcosporidia, 73 

 Sartorius, 611 

 Sauria, 551 

 Saw-fish, 424 

 Scale, ctenoid, 444, 464 

 cycloid, 444 

 ganoid, 444 

 insects, 266 

 San Jose, 316 

 Scalopus aquaticus, mole, 619 

 Scaphiopus, 485 



couchi, 475 

 Scaphognathite, 270 

 Scaphopoda, 258 

 Scapula, 465, 495 

 Scarabaeidae, family, 335 

 Sceloporus, 552 

 Sceroblasts, 125 



Schistocerca, shoshone, 310 ^ 

 Schistosoma, blood fluke, 745, <•>& 

 Schizogony, 73 

 Schizont, 750 

 Schizopod, 285 

 Schleiden, 43. 50 

 Schneider, 62 

 Schwann, 43, 50, 51 

 Sciaenidae, family, 454 

 Sciatic vein of frog. 509 

 Scientific method, 18 

 Scincidae, family, 555 

 Sclera, 401 



of frog eye, 529 

 Sclerites, 301, 305, 345 

 Scolex, 161, 761, 762, 763 

 Scolopendra, 291 

 Scolytidae, family, 335 

 Scomberomorus maculatus, 4i)^ 

 Scorpion flies, 266, 333 

 Scorpionida, order. 266, 295 

 Scorpions, 266, 298 

 Screech owl, 593 

 Scrombridae, family, 453 

 Scrotum of cat, 653 

 Scudderia, 315 



