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| 2 | early ancestor of the elephants | 
 
 
| 3 | very close relative to the mammoth | 
 
 
| 4 | tusks are as long as body | 
 
 
| 6 | known as the 'saber-toothed tiger.' | 
 
 
| 7 | prehistoric pig the size of a rhinos | 
 
 
| 9 | long snouted ancestor of the Sperm Whale | 
 
 
| 10 | smaller cousin of the Marsupial Lion | 
 
 
| 11 | tree ape | 
 
 
| 12 | prehistoric seal with a long neck | 
 
 
| 15 | 'the lizard king' | 
 
 
| 18 | earliest digging mammal discovered | 
 
 
| 21 | prehistoric cow | 
 
 
| 22 | one of the oldest carnivorous mammals | 
 
 
| 23 | freshwater dolphin found only in the Yangtze River in China | 
 
 
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