M 
Mallophaga, 153. 
meadows, beaver, 95. 
materials, 103. 
time of formation, 96. 
meat, use as, 163. 
Moraine colony, 50. 
mud pies, 146. 
musk bogs, 146. 
N 
nostrils, 5. 
O 
open season, 161. 
i 
parasites, 153. 
petrified dams, 33. 
plant food, 105. 
Platypsyllus castoris, 153. 
polygamy, 133. 
popular beliefs, 166. 
R 
races, 16. 
relation to fishing, 154. 
to bird life, 155. 
rutting season, 158. 
S 
sign heaps, 146. 
spillways, 43. 
INDEX 177 
Steneofiber, 12. 
stumps, 109, 110. 
swimming, 138. 
floating, 141. 
speed, 138. 
use of tail, 139. 
iE 
tail, 2. 
as trowel, 166. 
description, 2. 
slapping water, 139. 
use, 5. 
teeth, 7. 
toes, 4. 
trails, 87, 88. 
markings by brush, 93. 
tree cutting, 104. 
size of trees cut, 110, 117. 
time required, 117. 
when done, 121. 
trees as food, 104. 
Trogontherium, 12. 
Trogontherium cuvieri, 12. 
U 
underground passage, 94. 
V 
voice, 145. 
W 
walking, 141. 
water conservation, 51. 
weight, 8. 
