Introduction
1. The Fossil Record
Bias, Adequacy, and Sampling of the Fossil Record
Continuity and Discontinuity in the Fossil Record
History of a Fauna
Periodicity in Vertebrate Evolution
2. Morphology, Homology, and Function
A Problem of Black on Black
"Braincasts"
A Way to Look Inside Fossils
A Way to Tell Crocodiles Apart
Ratio Diagrams
The Concept and Definition of Homology
An Exercise in Homology
An Exercise in Functional Inference and Model-making
How a Strange and Ancient Animal Got About
3. Paleoecology and Faunal Analysis
Ecological Analysis of an Ancient Local Fauna
Faunal Analysis, Facies, and an Evolutionary Principle
The Long View
4. Systematics and Taxonomy
Patterns of Cladistic Evolution
Remarks on Vertebrate Phylogeny
Higher Categories in Phylogeny and Taxonomy
Supraspecific Variation and Higher Categories
The Reality of Higher Categories
The Concept of Species
Types, Name-bearers, and Hypodigms in Taxonomy
Taxonomic Linguistics
5. Some Bits of Biometry
An Application of Statistical Thinking and Methods
Range as a Zoological Character
Standardization of Normal Frequency Distributions
6. Biogeography
Approach to a Sampling Problem
A History of an Intercontinental Faunal Resemblance
Measurement of Faunal Resemblance
Migration Routes
An Example of Sweepstakes Dispersal
Probability and Time
Species Density of Recent North American Mammals
Historical Analysis of a Continental Mammalian Fauna
Index