v. 1. Artiodactyla : Bovinae to Ovibovinae -- v. 2. Artiodactyla : Bubalinae to Reduncinae -- v. 3. Artiodactyla : Aepycerotinae to Tragelaphinae. Antilocapridae. Giraffidae -- v. 4. Artiodactyla : Cervidae. Tragulidae. Camelidae. Suidae. Hippopotamidae
-- v. 5. Perissodactyla. Hyracoidea. Proboscidea. Addenda to the earlier volumes.
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