INDEX. 



429 



Ruminating animals, 322. 



act of feeding, 234. 



act of rumination, 325. 



groups of, 326. 



S. 



Salamandr^V-, hind-foot of, 33. 

 Salmo, caudal extremity of; 20. 

 Sacrum of birds, 233. , 



Sauropsida, general characteristics of, 101. 

 - — alimentary canal o^ 262. 



brain, 258, 259. 



. ear, 262. 



eye-muscles, 259. 



. heart, three forms of, 264 



larjjnx, 267. 



hver, 264. 



musdes and viscera, 256. 



nerves, 256. 



reproductive organs, 272, 



respu-atory organs, 269. 



stomach, 264. 



tongue of, 262. 



Seals. See Otarid£B, Phocidse, Pinnipedia. 



Be^retary-bu-d, skull of, 246. 



Sensoiy organs, 72. 



Sexual differences in man, 418. 



Sharks, aortic arch of, S9. 



aortic bulb, 116. 



pectoral arch, 34. 



skull, 24. 



Sheep, stomach of, 323. 

 Shrews {sorices), 384. 



Simiadae, general characteristics of, 391. 



divisions of, 392. 



skull, 891. 



teeth, 391. 



Sirenia, characteristics o^ 339. 

 Skate, brain of, 118. 

 Skeleton, amphibian, 151, 152. 



of anthropomorpha, 404. 



catarrhine monkey, 392. 



chelone noidas, section of, 172. 



elephant, 364. 



flying-fox, 384. 



fossil equidae, 305, 306. 



. horse, 296. 



icthyosauria, 209. 



limbs, 31. 



Uon, 352. 



owiithoscelida, transitional character of, 



223. 



ox, 321. 



plesiosaurus, 182. 



— — porpoise, 343. 



pterodactylus, 229. 



the skull, 22. 



visceral arches of lizard, mammal, and 



fish, 78. 

 See also Endoskeleton, Exoskeleton. 

 Skull of accipenser, 124. 



amphibian, 153. 



of anthropomorpha, 405. 



arches belonging to, 71. 



of bat, 386. 



birds, 241. 



carnivora, 350. 



— common fowl, 242. 

 . — - oetacea, 334. 



Skull of chelonia, 176, 177. 



cranial system, 22. 



crocodile, 218. 



cynomorpha, 397. 



dog, 353. 



elephant, 365. 



fishes, 31. 



foetal cachalot, 341. 



frog, 152, 153. 



hedgehog, 376. 



. horse, 297. 



lacertiUa, 189, 190. 



lemuridfe, 339. 



man, 414, differences in, 420 



marmoset, 393. 



modifications of, 24. 



mudfish, 145, 146. 



• nerves of, 66-71. 



ophidia, 202. 



ornithoscelida, 227. 



ostrich, 243. 



osseous brain-case, 24, 25 



pi? 



,314. 



pike, 132-135. 



plaice, 30. 



platyrrhini, 395. 



plesiosauria, 183. 



porpoise, 343. 



pterosauria, 230. 



rabbit, 372. 



rattlesnake (erotalus), 206. 



rhinoceros, 307. 



seal, 362. 



secretary-bird, 240. 



sirenia, 330. 



spatularia, 123. 



sturgeon, 124. 



trematosaurus, 123. 



typical segment ofi 25. 



wahus, 360. 



whale, 327, 323. 



Sloths, characteristics o^ 28» 



ankle-joint, 283. 



hmbs, 233. 



pelvis, 233. 



tongue, 236. 



vertebrae, 283. 



Snakes. See Ophidia. 

 Sorices (shrews), 334. 

 Spatularia, skull of, 123. 

 Spinal canal and cord, 65. 



system, 17. 



Spleen, 91. 



Spouting, mechanism of, in oetacea, 843. 



Spur of birds, 254. 



Squatina (monkfish), pectoral member of; 39 



sections of skull, 115. 



Stenson, canals of, 72. 

 Sternum in birds, 240, 241. 



of firog, 157. 



of lizard, 35, 36. 



Stomach, 79. 



of camels, etc., 328. 



carnivora, 351. 



musk-deer, 323. 



porpoise. 346. 



ruminating animals, 322. 323, 



sauropsida, 264. 



sheep, 323. 



teleostei, 139. 



Sturgeon, skull of, 24, 124. 



