GEOGRAPHICAL AND GEOLOGICAL DISTRIBUTION 93
I. Geographical Distribution 93
Zoological regions, 96; Palæarctic region, 97; Ethiopian
region, 98; Oriental region, 100; Celebes, 102; Nearctic
region, 102; Neotropical region, 103; Aquatic mammals, 104.
II. Geological Distribution 107
Sequence of strata, 107; Mesozoic mammals, 109;
Multituberculata, 109; Polyprotodont types, 113; Tertiary
mammals, 115.