Index 



725 



Spongia, 379, 381 



Spongillidae, 382 



Spongin, 377 



Spongocoel, 377, 379 



Spoonbill, 569, 582, 589, 590 



Spore, 316, 351 



Sporocyst, 410, 413 



Sporogony, 363, 364, 365 



Sporozoa, 352, 363-367 



Sporozoite, 364, 365, 367 



Spring peeper (see Hyla), 596, 599 



Springtail (see Collembola), 536 



Spur, 91, 241 



Squalus, 83, 567, 576-579, 580 



Squamata, 603, 606-610 



Squamosal bone, 57 



Squid, 45, 209, 212, 348, 466, 468, 477- 



480, 637 

 Squilla, 507 

 Squirrel. 630, 637 



Standing-water communities, 660-663 

 Stapes, 220, 221, 222 

 Starch. 31. 138, 140 

 Starfish. 45. 92. 148, 253, 348, 541, 542, 



543, 544-549 

 Statoblast, 482, 483 

 Statocyst, 393, 503. 543 

 Stegosaurus, 613, 614 

 Stem reptiles (see Cotylosauria) 

 Stentor, 373 

 Sterility, 146. 257 

 Sternebrae, 108 

 Sternum, of Cambarus, 492 



of insect 522 



of vertebrate, 58, 107, 108 

 Steroid, 236, 241, 242 

 Stickleback, 590 

 Sties. 81 

 Stimulus, 24 

 Stinging capsule (see nematocyst), 



384. 385. 387 

 Stingray, 576. 580, 581 

 Stink bug, 539 



Stirrup (see stapes), 220, 221, 222 

 Stolon. 391 

 Stomach, 132-133 

 Stomach-intestine, 457 

 Stomodaeum. 426 

 Stone canal, 543, 546, 552 

 Stork, 625 

 Stratum compactum. 54, 55 



corneum. 54. 55. 79 



germinativum, 54, 55, 79 



granulosum, 79 



lucidum, 79 



spongiosum, 54. 55 

 Stream communities, 663 

 Striated muscle (see skeletal muscle), 

 58, 116, 122-126, 190 



Strigiformes, 625 



Strobila, 395 



Strongylura, 590 



Struthioniformes, 623 



Sturgeon. 83, 569, 582, 589, 590 



Styela. 293 



Stylaria. 461 



Stylet, 429 



Stylotella, 382 



Subclavian artery. 65, 166, 167 



vein, 66. 168, 183 

 Subcutaneous, 80 

 Subesophageal ganglion, 502, 526 

 Sublittoral zone. 664. 665-666 

 Submentum, 521, 522 

 Submucosa. 135, 136 

 Subpharyngeal ganglion, 459 

 Subumbrella, 393 

 Subunguis, 85, 86 

 Subvertebral lymph sinus, 69 

 Succession, 657-659 

 Sucker, 402, 411, 462, 478 

 Sucker fish. 590 

 Suckfish. 589, 590 

 Sucking lice, 539 

 Sucrase, 139, 140 

 Suctoria, 352, 373, 374 

 Sugar, 31, 34-35, 145, 238 



beet nematode (see Heterodera), 

 429, 430 

 Sulcus. 198 



Sulphur-bottomed whale, 637 

 Summation, 124, 173, 209 

 Sun animalcule (see Heliozoa) 

 Sun spider, 514 

 Sunfish, 46, 84, 590 

 Supplemental air, 156 

 Supraesophageal ganglion, 502, 526 

 Supraorbital ridge, 215 

 Suprapharyngeal ganglion, 459 

 Suprarenal artery, 233 



body (see Adrenal medulla or 

 Cortex) 

 Survival of the fittest, 323 

 Sus (see Pig) 

 Suspension, 33 

 Suture, 100, 104, 113 

 Swallow. 624 

 Swan. 151, 625 

 Sweat. 77, 78. 186. 239 



gland. 39, 77, 82 

 Swift, 625 



Swim bladder. 582. 586 

 Swimmeret, 495, 496, 499 

 Swine (see Pig) 

 Swordfish, 587, 589 

 Sycon, 379 



Sylvilagus, 630, 635, 636 

 Symbiosis, 350, 351 



