508 



INDEX. 



Sensory organs, 78. 



Sexual differences in man, 493. 



Sharks, aortic arch of, 92. 



aortic bulb, 132. 



pectoral arch, 34. 



Sharks, skull, 21. 

 Sheep, stomach of, 379. 

 Shrews (sorices), 452. 

 Simiadse, general characteristics 



of, 461. 



divisions of, 462. 



skull, 461. 



teeth, 461. 



Sirenia, characteristics of, 387. 

 Skate, brain of, 134. 

 Skeleton, amphibian, 174, 175. 



of anthropomorpha, 477. 



catarrhine monkey, 462. 



• ■ chelone midas, section of, 



199. 



elephant, 429. 



flying fox, 453. 



fossil equid®, 358, 359. 



horse, 347. 



icthyosaiiria, 244. 



limbs, 31. 



lion, 414. 



omithoscelida, transitional 



character of, 261. 



ox, 377. 



plesiosauius, 210. 



porpoise, 403. 



pterodactylus, 267. 



the skull, 19. 



visceral arches of lizard, 



mammal, and fish, 85. 



See also Endoskeleton, Exo- 

 skeleton. 

 Skull of accipenser, 141. 



amphibian, 177. 



of anthropomorpha, 478. 



arches belonging to, 77. 



of bat, 455. 



birds, 282. 



carnivora, 412. 



common fowl, 283. 



cetacea, 392. 



chelonia, 203-205. 



cranial system, 18. 



crocodile, 254. 



cynomorpha, 469. 



dog, 415. 



elephant, 428. 



Skidl of fishes, 30. 



— fcetal cachalot, 401. 



frog, 175, 176. 



hedgehog, 443. 



horse, 348. 



lacertilia, 219, 221. 



lemuridfe, 458. 



man, 489 ; differences in, 495. 



marmoset, 463. 



modifications of, 21, 



mudfish, 168, 169. 



nerves of, 71-77. 



ophidia, 235. 



omithoscelida, 265. 



ostrich, 284. 



osseous brain-case, 21-23. 



pig, 368. 



pike, 151, 152, 154, 155. 



plaice, 29. 



platyrrhini, 466. 



plesiosauria, 212. 



porpoise, 403. 



pterosauria, 268. 



rabbit, 438. 



rattlesnake (crotalus), 240. 



rhinoceros, 360. 



seal, 425. 



secretary bird, 287. 



sirenia, 388. 



spatularia, 140. 



sturgeon, 141. 



trematosaurus, 179. 



typical segment of, 23. 



walrus, 424. 



whale, 396, 397. 



Sloths, characteristics of, 331. 



ankle-joint, 331. 



limbs, 33!. 



pelvis, 331. 



tongue, 335. 



vertebrae, 331. 



Snakes. See Ophidia. 



Sorices (shrews), 452. 



Spatularia, skull of, 140. 



Spinal canal and cord, 69. 



system, 11. 



Spleen, 101. 



Spouting, mechanism of, in ceta- 

 cea, 409. 



Spur of birds, 297. 



Squatina (monkfish), pectoral 

 member of, 39. 



sections of skull, 130, 



