INDEX 



54' 



Spiroloculina, 26. 



Spun/, i pert mi, 255, 



Spittie insect, 209. 



Splanchnic mesoderm, 51. 



Spleen, of dogfish, 277; of frog, 301; of 



Mammalia, 360 ; ol pigeon, 333 ; of trout, 



288. 

 Splint bones, 378. 

 Spoil (47, 451. 



Spongilla fluviatilis, 57 ; .S. lieberkiihnii, 57. 

 Spongin, 55. 



Spontaneous generation, 3, 496, 499. 

 Spoonbills, 342. 



Sporangium, of Mycetozoa, 14, 15. 

 Sporocyst, in. 

 Sporosacs, 64. 

 Sporozoa, 33. 

 Spotted lynx, 404. 

 Spring tails, 197, 227. 

 Spurs, of birds. 330, 331. 

 Squalodon, 433. 

 Squamata, 311. 

 Squammulina, 25. 

 Squamosal, of frog, 300. 

 Squash bug, 210. 

 Squids, 255, 256. 

 Squilla, 1 



Squirrels, 387, 388, 453. 

 Stag beetles, 219. 

 Starfish, 89. 

 Starlings, 355. 

 Star-nosed mole, 393. 

 Statoblasts, 131. 

 Steganopodes, 341. 

 Stegocephali, 420, 425, 432. 

 Stegomyia, 216. 

 Stellate ganglion, 252. 

 Stentor polymorphous, 47. 

 Stephanoceros, 127. 

 Sterlet, 285. 



Sterna, of cockroach, 203. 

 Sternum, of fowl, 331; of lizards, 312; of 



lobster, 147 ; of Mammalia, 357, 359. 

 St. Hilaire, the elder, 506. 

 Sticklebacks, 294. 

 Stigma, 176; of Doliolum, 265; of Flagellata, 



40. 

 Stipes, 193. 

 Stoat, 399. 



Stolon, of Salpa, 267. 

 Stolons, of Tunicata, 264. 

 Stomach, of Mammalia, 360; of ruminants, 



381. 

 Stomatopoda, 163. 

 Stone canal, 86. 

 Stone cats, 290. 

 Stone flies, 200, 227. 

 Stone lilies, 87. 

 Storks, 342. 



Stormy petrels, 349. 



Stratified rocks, thickness of, 418. 



5,348. 

 Striped bass, 292. 

 Striped hyena, 402. 



bila, 79, 81. 

 Strongylocentrotus, 97. 

 Struggle for existence, 462, 502. 

 Strut/no came/us, 327, 338. 

 Struthiones, 338. 

 Sturgeons, 284. 



:ic/ua mytilus, 47, 49. 

 Subfrontal plate, 150. 

 Subgenital pits, 78, 80. 

 Submentum, 193. 



rranean animals, 451. 

 Suckfish, 295. 

 Suctoria, 49. 



Sulphur bottom whale, 376. 

 Sulphuric acid, secretion of, 233. 

 Sunbirds, 355. 

 Sunfish, 296. 



Supra-ethmoid, of trout, 288. 

 Supra-occipital, of trout, 288. 

 Supra-scapula, of frog, 300. 

 Surinam toad, 304. 

 Surplus energy, 390. 

 Survival of the fittest, 463, 485. 

 Suspensorium, of frog, 300. 

 Sus scrofa, 380 ; .S. scrofa domesticus, 380. 

 Swallows, 355. 

 Swans, 342. 

 Sweat glands, 356. 

 Swellfishes, 296. 

 Swifts, 348. 



Swimming bladder, 283; of Teleostei, 287. 

 Swine, 457. 

 Swordfish, 292. 

 Sycandra raphanus, 58, '59. 

 Sycoti ciliatum, 60 ; S.gelatinosum, 54, 55, 57. 

 Symbiosis, 30. 



Sympathetic ganglia, of Dentalium, 242. 

 Sympathy, in animals, 492. 

 Syncoryne, 64. 

 Syncrypta, 38. 

 Synotus barbastellus, 395. 

 Syn-sacrum, of pigeon, 333. 

 S\ nan bear, 398. 

 Syrinx, of pigeon, 333. 



ma Naturae, 501. 

 Systematic Botany, definition of, 513. 

 Systematic Zoology, definition of, 513. 



Tabulae, of Millipora, 67. 



Tadpole larva, of Tunicata, 267. 



Tadpoles, 305, 306. 



Ttznia echinococcus, 116; T. mediocanellata, 

 115; T. saguiata, 112, 115, 116; T. ser~ 

 rata, 112; T. solium, 112, 114, 115, 116. 



