INDEX 



Size — contd. 



{for particular animals 

 see their names) 

 Skulls : 



" Bull-dogging " of skulls 

 in elephants, pugs, etc., 

 103-105, 106 

 Primitive man, skull com- 

 pared with that of a 

 monkey and of a mo- 

 dern man, 87-90 

 {for particular animals 

 see their names) 

 Sloths : 



Giant ground sloth, Mega- 

 therium : 

 Photograph of skeleton, 



7 

 Probable appearance in 

 life — illustration, 171 

 Living sloths of South 

 America : 

 Size compared with re- 

 presentatives in the 

 past, 166, 167 

 Mylodon and two-toed 

 sloth, comparison be- 

 tween : skeletons, etc., 

 172, 173 

 Two-toed specimens — pho- 

 tograph, 168 

 Smaller creatures — vast num- 

 ber included in 

 " Extinct Animals " — 

 mountains built up of 

 rock formed by the 

 coral, etc., 266 

 Snake : 



Fossil remains of, found in 



the Fayum, 125 

 Size of extinct snakes : 

 large size, 191 



Soft-bodied animals — no re- 

 mains in rocks to show 

 earliest form of animal 

 life preceding the 

 Cambrian Trilobites 

 and Lingula, 263, 275 



South Africa see Africa 



South America see America 



Sphenodon punctatus (New 

 Zealand lizard, Tua- 

 tara) — photograph, 193 



Spiders — surviving represen- 

 tative of aquatic an- 

 cestors from which 

 modern air-breathing 

 scorpions and spiders 

 have been developed, 

 282, 283 



Spiral fold on walls of intes- 

 tine — skeleton with 

 excrement of the 

 ichthyosaurus, 229 



Spy, Belgium — skulls of pri- 

 mitive men found in 

 caverns, 89 



Squii'rels — flying squirrels, 234: 



Star fish refer to Stone-lilies 



Stegosaurus — probable ap- 

 pearance in life of the 

 Jurassic Dinosaior Ste- 

 gosaurus, 208 



Steller, discoverer of sea- 

 cow, 21, 22 



Stirling, Dr., 185 



Stone-lilies, or pentacrini, or 

 encrinites : 

 Block of limestone showing 

 several kinds of stone- 

 liles from Iowa, 288 

 British encrinite — Vaughan 

 Thompson's discovery, 

 etc., 290 



V* 



