nS"DEX. 



431 



Seal, 22, 391. 

 Sea-lion, 391. 

 Sea-otter, 890. 



Sea-poroh (Serranus), 294, 296. 

 Sea-urohins, 111, 168. 

 Secretary-bird, 88. 

 Selaolie, 297. 

 Solasphorus, 78. 

 Selenodonta, 373, 375. 

 Scmcle, 263. 

 Scmioptera, 107. 

 Semnopitliecus, 394, 398, 399. 

 SerpoQtarius, 88. 



Serpents, dispersal of, 46 ; distribu- 

 tion of, 320. 

 Serval, 384. 

 Sewellel, 360. 

 Shark, 293, 297, 299, 300. 

 Sheep, 379, 380. 

 Slircw, 345, 346. 

 Shrike, 65, 100. 

 Sialia, 66. 

 Siamang, 397. 

 Sidorastrffia, 249. 

 Sidarina, 248. 

 Sieboldia, 306, 311. 

 Sigmodon, 356. 

 Silurian fauna, 142. 

 Siluridas, 68, 80, 89. 

 Simosaurus, 159. 

 Siphonia, 168. 

 Siren, 306, 311. 

 Sirenia, distribution of, 339. 

 Siskin, 70. 

 Sistrurus, 823. 

 Sittidae, 05, 107. 

 Sivatherium, 877. 

 Skink (Eumeces), 316. 

 Skip-jaok, 297. 

 Skipper, 297. 

 Skunk, 4, 890. 

 Slimonia, 148, 278. 

 Sloths, 837. 



Smelt (Osmerus), 294, 303. 

 Snapper (Mesoprion), 296. 



Snipe (fossil), 332. 



Snow-partridge, 66. 



Solenidte, 272. 



Solcnodon, 346. 



Soles (El.ombus, Pleuronectes, Solea), 

 M4, 296. 



Solitaire (Pezophaps), 338. 



Somateria, 69. 



Sonoran transition region, 106. 



Sorex, 846. 



SpalacidsE, 357. 



Sparrow, 65, 197; fossil, 332. 



Species, appearance of, 100 ; extinc- 

 tion of, 197; distribution of, 17- 

 26 ; ancient migrations of, 220, 

 229. 



Spelerpes, 306. 



Spormophile, 359. 



Sperm-whale, 341, 342. 



SphiErexochus, 278. 



SphiErulites, 169. 



Sphargis, 313. 



Sphenodon, 820. 



Sphenotrochus, 243. 



Splicroidina, 109, 235, 236. 



Spiee-bird, 78. 



Spider-monkey, 394, 395. 



Spiders, 285. 



Spiny-mice, 355. 



Spiny-rats, 860. 



Spirifer, 145. 



Spirit'erina, 165. 



Spirula, 20. 



Sponges (deep-sea), 110 ; Cretaceous, 

 168. 



Sprat (Clupea), 295. 



Springbok, 84, 377. 



Squalodon, 344. 



Squaloraja, 300. 



Squatina, 800. 



Squirrel, 358, 365. 



Squirrel-monkey, 395. 



Stag, 381, 382. 



Stagonolepis, 328. 



Standard-wing, 107. 



