INDEX.- 



431 



Seal, 22, 391. 

 Sea-lion, 891. 

 Sea-otter, 390. 



Sea-poroh (Serrauus), 294, 298. 

 Sea-urchins, 111, 168. 

 Secretary-bird, 88. 

 Selaolie, 297. 

 Solasphorua, 78. 

 Sslenodonta, 373, 375. 

 Scmele, 263. 

 Scmioptera, 107. 

 Semnopithecus, 394, 398, 899. 

 Sorpontarius, 88. 



Serpents, dispersal of, 45 ; distribu- 

 tion of, 320. 

 Serval, 384. 

 SewoUel, 360. 

 Shark, 293, 297, 299, 300. 

 Sheep, 379, 380. 

 Slirew, 345, 346. 

 Shrike, 65, 100. 

 Sialia, 66. 

 Siamang, 397. 

 SidcrastrsBa, 249. 

 Siderina, 248. 

 Sieboldia, 306, 311. 

 Sigraodon, 856. 

 Silurian fauna, 142. 

 SiluridEO, 68, 80, 89. 

 Simosaurus, 159. 

 Siphonia, 168. 

 Siren, 306, 311. 

 Sirenia, distribution of, 839. 

 Siskin, 70. 

 Sistrurus, 323. 

 Sittjdee, 05, 107. 

 Sivatherium, 377. 

 Skink (Eumoces), 818. 

 Skip-jack, 297. 

 Skipper, 297. 

 Skunk, 4, 890. 

 Slimonia, 148, 278. 

 Sloths, 837. 



Smelt (Osmerus), 294, 803. 

 Snapper (Mesoprion), 296. 



Snipe (fossil), 332. 



Snow-partridge, 68. 



Solenidse, 272. 



Solenodon, 346. 



Soles (EhombuB, Pleuronectes, Solea), 

 !J94, 296. 



Solitaire (Pezophaps), 333. 



Somateria, 69. 



Sonoran transition region, 108. 



Sorox, 346. 



Spalacidaj, 357. 



Sparrow, 65, 197 ; fossil, 332. 



Species, appearance of, 190 ; extinc- 

 tion of, 197 ; distribution of, 17- 

 26; ancient migrations of, 220, 

 229. 



Spelerpes, 308. 



Spermophile, 359. 



Sperm-whale, 341, 342. 



Sphserexochus, 278. 



Sphierulites, 169. 



Sphargis, 313. 



Sphenodon, 320. 



Sphenotrochus, 243. 



Spheroidina, 109, 235, 236. 



Spice-bird, 78. 



Spider-monkey, 394, 395. 



Spiders, 285. 



Spiny-mice, 855. 



Spiny-rats, 360. 



Spirifer, 145. 



Spiriferina, 165. 



Spirula, 20. 



Sponges (deep-sea), 110 ; Cretaceous, 

 168. 



Sprat (Clupea), 295. 



Springbok, 84, 377. 



Squalodon, 344. 



Squaloriy'a, 300. 



Squatina, 300. 



Squirrel, 858, 865. 



Squirrel-monkey, 395. 



Stag, 381, 382. 



Stagonolepis, 328. 



Standard-wing, 107. 



