INDEX 



817 



Skull (cotit.) 



frog, 328. 



horse, 695. 



insectivores, 582. 



kinesis, 272, 377, 412. 



lamprey, 87. 



Latimeria, 272. 



man, 637, 650. 



marsupials, 557. 



monotremes, 551. 



morphology, 142, 195, 230. 



ophidia, 411. 



osteolepis, 269, 325. 



palaeoniscoidea, 230. 



primates, 605, 618, 637. 



ratites, 514. 



reptiles, 375, 391, 402, 411, 417. 



rhinoceros, 728. 



rodents, 657. 



Sphenodon, 402. 



squamata, 405. 



stegocephalia, 325. 



sturgeon, 234. 



synapsida, 539. 



tapir, 727. 



whales, 668. 

 Skunk, 686. 

 Sloth, 599. 

 Smilodon, 688. 

 Sminthopsis, 565. 

 Snipe, 519. 

 Social behaviour, artiodactyls, 745. 



birds, 492. 



carnivores, 681. 



cervidae, 757. 



elephants, 713. 



fishes, 227. 



man, 613. 



primates, 610, 616, 621, 624, 630. 



rodents, 657. 



snakes, 401. 



ungulates, 697. 



whales, 672. 

 Solar radiation, variations of, 15. 

 Solea, 237, 251. 

 Solenodon, 583. 

 Song, birds', 497. 

 Sorex, 584. 



Sound production, see Voice. 

 Sparidae, 265. 

 Sparrow, 521. 

 Species, definition, 122. 

 Species formation, birds, 524. 



Lampetra, 119. 

 Sperm, whale, 674. 

 Spheniscus, 514. 

 Sphenodon, 380, 384, 402, 772. 

 Sphyraena, 251. 

 Spider monkey, 620. 



Spinal cord, amphibia, 344. 



amphioxus, 37. 



Balanoglossns , 54. 



function in fishes, 136. 



Lampetra, 97. 



tunicates, 69, 74. 

 Spinal nerves, amphibia, 345. 



amphioxus, 37. 



cyclostomes, 97. 



elasmobranchs, 148, 173. 

 Spinax, 254. 

 Spiralia, 48. 

 Spleen, see Blood. 

 Spurway, H., 783. 

 Squaloidea, 182. 

 Squalus, 182. 

 Squamata, 404. 

 Squatina, 182. 

 Squirrel, 657. 



Star-gazer, see Uranoscopus. 

 Star navigation, 494. 

 Starling, 437, 470, 492, 521. 

 Statoreceptors, see Ear. 

 Steatornis, 489. 

 Stegocephalia, 296, 356. 

 Stegosaurus, 425. 

 Stegodon, 716. 

 Stegolophodon, 716. 

 Stegomastodon, 716. 

 Stegoselachii, 186. 

 Stensio, E., 127. 

 Stereospondyli, 359. 

 Sterna, 493. 

 Sternum, birds, 438. 

 Stickleback, 225, 251. 

 Stoat, 686. 

 Stomach, actinopterygii, 201, 223. 



amphibia, 342. 



artiodactyls, 743. 



birds, 468. 



camel, 743. 



edentata, 600. 



elasmobranchs, 158. 



kangaroos, 567. 



origin of, 159. 



rabbit, 662. 



rodents, 657. 



ruminants, 699, 743. 



ungulates, 699. 



whales, 669. 

 Stomochordata, 50. 

 Stork, 471, 494. 

 Strigiformes, 520. 

 Struthio. 514. 

 Struthiomimus, 423. 

 Sturgeon, 234, 262. 

 Sturnus, 521. 

 Subholostei, 234. 

 Subneural gland, 65. 



