764 



Sporozoa, 80, 109, 152 

 Sporozoites of Monocysiis, 45 



of Plasmodium, 74, 77 

 Springtails, 246, 24g 

 Squalus, 311 

 Squamata, 550, 579 

 Squirrels, 485, 559 



flying, 485 

 Stable-fly, 256 

 Stadium, 245 

 'Staggers,' 132 

 Stapes, 428, 586 

 Starch, 8, 444 



granules in Poly torn a, 37 

 Starfish, 286, 297 



alimentary canal of, 290 



behaviour of, 294 



bod^^-wall of, 288 



ccelom of, 288 



development of, 670 



excretion of, 291 



external features of, 286 



food of, 291 



larva of, 295 



nervous system of, 288 



perihsemal and pseudohaemal 

 systems of, 293 



reproduction of, 293 



water vascular system of, 291 

 Statocysts of crayfish, 213 



of medusa, 106 



of molluscs, 269, 281 

 Stearic acid, 9 

 Stearin, 9 

 Stegocephalia, 547, 548, 561, 567, 



578. 585 

 Stenohaline animals, 194, 291 



Stenopodium, 198 



Sternebrse, 425 



Sternum of cockroach, 228, 230 



of crayfish, 195 



of frog, 357 



of lizard, 561 



of Ornithorhynchus, 497 



of pigeon, 405 



of rabbit, 421, 425 



Stick-insects, 249 



Stigma (eyespot, pigment spot) 



flagellates, 37, 40 



Stigmata of cockroach, 234 



Stimulus, 6 



effects of, on Amceba, 30 



on Hydra, 94 



on nerve, 612 



on nerve net, 94 



on Paramecium, 50 



Stipes, 229 



Stoat, 489. 



INDEX 



Stomach of crayfish, 204 

 of dogfish, 322 

 of frog, 365 

 of leech, 182 

 of medusae, 105 

 of rabbit, 441 

 of ruminants, 594 

 of sheep, 493 

 of snail, 267 

 of starfish, 290 

 of swan mussel, 276 

 of vertebrates, 594 

 See also Canal, alimentary 

 Stomodaeum, 637, 656. See also 



Fore-gut 

 Stomoxys, 256 

 Stone canal, 289, 291 

 Stone-fly, 246, 250 

 Stratum corneum, 508 

 granulosum, 508 

 lucidum, 508 

 of Malpighi, 508 

 Strepsiptera, 260 

 Streptostyly, 583 

 Strobila, 128 

 Strobilisation, 114 

 Sturgeon, 545, 546, 553 

 Styella, 676 

 Style, crystalline, 276 

 Styles of cockroach, 230 

 Subclass, 25 

 Subgenital pits, 112 

 Subgerminal cavity, 647 

 Submentum, 240 

 Subspecies, 708 

 Subumbrella, 105 

 Subzonal membrane, 668 

 Suckers of leech, 179 

 of liver fluke, 118 

 of tapeworm, 127 

 of tube feet, 288 

 Suctoria, 80 

 Sugar, 8 

 cane, 8, 44 



grape, 8. See Glucose 

 malt, 8, 444 

 milk, 444 

 Sulci, cerebral, 460 

 Superfamily, 25 

 Superlinguse, 232 

 Supination, 437 

 Supradorsals, 316 

 Suprarenal gland. See Gland, 



adrenal 

 Sus scrofa, 492 

 Sutton, W. S., 697 

 Sutures, 426, 539 

 Swan mussel, 270. See Mussel, swan 



