Iiq^DEX. 



431 



Seal, 22, 391. 

 Sea-lion, 391. 

 Sea-otter, 390. 



Sea-perch (Serranus), 294, 296. 

 Sea-urchins, 111, 168. 

 Secretary-bird, S8. 

 Selache, 297. 

 Sclasphorus, 78. 

 Sjlenodonta, 373, 375. 

 Scmele, 263. 

 Scmioptera, 107. 

 Semnopithecus, 394, 398, 399. 

 Serpcutarius, 88. 



Serpents, dispersal of, 45 ; distribu- 

 tion of, 320. 

 Serval, 384. 

 Sewellel, 360. 

 Shark, 293, 297, 299, 300. 

 Sheep, 379, 380. 

 Shrew, 345, 346. 

 Shrike, 65, 100. 

 Sialia, 66. 

 Siamang, 397. 

 Siderastrsea, 249. 

 Siderina, 248. 

 Sieboldia, 306, 311. 

 Sigmodon, 356. 

 Silurian fauna, 142. 

 Silurida?, 68, 80, 89. 

 Simosaurus, 159. 

 Siphonia, 168. 

 Siren, 306, 311. 

 Sirenia, distribution of, 339. 

 Siskin, 70. 

 Sistrurus, 323. 

 Sittidae, 65, 107. 

 Sivatherium, 377. 

 Skink (Eumcces), 315. 

 Skip-jack, 297. 

 Skipper, 297. 

 Skunk, 4, 390. 

 Slimonia, 148, 278. 

 Sloths, 337. 



Smelt (Osmerus), 294, 303. 

 Snapper (Mesoprion), 296. 



Snipe (fossil), 332. 



Snow-partridge, 66. 



Solenida3, 272. 



Solenodon, 346. 



Soles (Rhombus, Pleuronectes, Solea), 

 294, 296. 



Solitaire (Pezophaps), 333. 



Somateria, 69. 



Sonoran transition region, 106. 



Sorcx, 346. 



Spalacida3, 357. 



Sparrow, 65, 197 ; fossil, 332. 



Species, appearance of, 190; extinc- 

 tion of, 197; distribution of, 17- 

 26 ; ancient migrations of, 220, 

 229. 



Spelei-pes, 306. 



Spermophile, 359. 



Sperm-whale, 341, 342. 



Sphaerexochus, 278. 



Sphierulites, 169. 



Sphargis, 313. 



Sphenodon, 320. 



Sphenotrochus, 243. 



Spheroidina, 109, 235, 236. 



Spice-bird, 78. 



Spider-monkey, 394, 395. 



Spiders, 285. 



Spiny-mice, 355. 



Spiny-rats, 360. 



Spirifer, 145. 



Spiriferina, 165. 



Spirula, 20. 



Sponges (deep-sea), 110 ; Cretaceous, 

 168. 



Sprat (Clupea), 295. 



Springbok, 84, 377. 



Squalodon, 344. 



Squaloraja, 300. 



Squattna, 300. 



Squirrel, 358, 365. 



SquiiTel-monkey, 395. 



Stag, 381, 382. 



Stagrinolepis, 328. 



Standard-wing, 107. 



