610 



INDEX 



Rhizostoma pulmo, 146 



Rhodites rosae, gall, 286 



Rhynchocephalia, 380, 387 



Rhythmicity, 74, 454 



Rhythms, 482 



Ribs, 317-320, 406, 551 



Ring canal, 194, 206 



Rodentia, 411, 414 



Rodents, 421 



Rodolia cnrdinalis, 289 



Rods, 247 



Roe, 355 



Ross, Ronald, 90 



Rostellum, 166, 168 



Rostrum, 250, 261, 263 



Rotalia freyeri, 81 



Rotifera, 185, 544, 547 



Rotifers, 105, 185-187, 442, 443, 467, 480, 539, 552 



Roundmouths, 334 



Roundworms (see Nemathelminths) 



Routine, 492 



Royal jelly, 293 



Rudimentary organs, 516 



Rumen, 416 



Ruminants, 416, 421 



stomach, 416 

 Running birds, 401 

 Running insects, 273 



Sabellids, 243, 244 



Saber-toothed tiger, 522, 523 



Saccul'na, 497 



Sacculus, 330, 331 



Sacral vertebrae, 320 



Sacrum, 319, 619 



Sagitta, 185. 447 



Sagitta hexaptera, 185 



Salamanders, 114, 334, 359, 364, 366, 368 



embryo, 620 

 Salientia, 364, 366 

 Salinity, 503 

 Saliva, 321 



Salivary glands, 97, 98, 321, 468 

 Salmon, 355, 356, 502 



brain. 351 



tail, 349 

 Salts, S, 19, 20, .38, 454 

 Sand dollars, 201, 203 

 Sandpipers, 401 

 Sand worm, 242, 243 

 Sanitation, 492 

 Saprophytic types, 80 

 Sarcode, 18 

 Sarcodina, 78, 79, 82. 87 



(See also Rhizopoda) 

 Sarcolemma, 104 

 Sarcoplasm, 100, 177 

 Sarcoptes scahiei, 301 

 Sauropsida, 375 

 Sawfish, 341 

 Scabies, 302 

 Scab mites, 302 

 Scala tympani, 330, 331 

 Scala vestibuli, 330, 331 



Scale insect, 289 



Scale lice, 289, 290 



Scales, 53, 318, 344-348, 367, 378, 379, 384, 415 



Scallops, 221, 226 



Scaphognathite, 250, 253 



Scaphopoda, 217, 221, 513 



Scapula, 319, 321, 388 



Scarlet fever, 491 



Scent glands, 406 



Scents, animal, 464 



Schistoccrca americana, 271 



Schleiden, 31, 554 



Schwann, 31, 554 



Schultze, Max, 18, 31, 554 



Sclater, 504 



Scleroblasts, 1.30 



Sclerotic layer, 332, 333 



Scolex, 165, 166, 168 



Scolopendra, 269 



Scolytid beetle, work, 285 



Scorpions, 299-.300, 510, 514 



Scutes, 383, 384 



Scutigera, 269 



Scyllium cariicula, brain, 340 



Scyphistoma, 149, 150 



Scyphozoa, 143, 144, 146, 513 



Sea anemones, 143-145, 261, 495, 496 



Sea angels, 220 



Sea cucumbers, 201, 204-207 



Sea fans, 143, 146, 147 



Sea lilies, 201, 205, 206 



Sea lions, 414 



Sea mats, 187 



Sea moss, 187 



Sea pens, 143, 146, 147 



Sea slugs, 221 



Sea snakes, 385 



Sea squirts, 311 



Sea urchins. 111, 112, 201-204, 438, 513 



Seals, 414 



Seasonal changes, 477, 482 



Sebaceous glands, 98, 318, 406 



Secretary bird, 506 



Secretin, 431 



Secretion, 32-35, 65, 97, 102, 138, 168, 322, 323, 



333, 335, 376, 393, 411, 463-464 

 Secretions, 28, 35-36, 65, 97, 98, 102, 161, 171, 



235, 236, 268, 287, 298, 311, 321, 323, 335, 



359, 366, 368, 382, 395, 400, 439, 452, 46.3- 



464, 468, 471 

 Sedgwick, Adam, 267 

 Segmentation, 120 

 cavity, 119, 120, 123 



{See also Blastocoel) 

 Segments, 51 

 Segregation, 530-535 

 Self-fertilization, 106, 141, 162, 219, 442 

 Self-regulatory tendency, 489 

 Semicircular canals, 330, 331, 336, 341, 369 

 Semilunar ganglion, 328 

 Seminal groove. 230 



Seminal receptacles, 166, 167, 235, 258, 297 

 Seminal vesicles, 160, 161, 235 

 Semipermeable membrane, 12 

 Senescence, 43, 44 



