INDEX 257 
Tracks, of Mylodon, 46 
of worms, 3, 33 
Triceratops, brain, 94 
broken horn, 102 
description, 100, 101 
restoration, 126* 
- skeleton, 103* 
Tufa, 14 
Tukeman, killing of the Mammoth, 177, 193 
Variation in animals, 228 
Vertebrates, oldest, 22 
Vestigial structures, 201, 202 
Volcanic outbursts, 231, 232 
Webster, F. S., on destruction of gar pikes, 26 
White, C. A., on the nature and uses of fossils, 17 
White Shark, 65 
Wings, 71, 72,* 73 
of embryonic birds, 73 
Wood, fossil, 9, 10 
Worm trails, 3, 33 
~ Yucca, fertilization, 235 © 
Zeuglodon, abundance of remains, 60 
same as Basilosaurus 
description, 58, 63 
habits, 59 
