Contains 12 volumes: pt. 1. Algae, pt. 2. Microorganisms (fungi), pt. 3. Lichens, pt. 4. Bryophytes, pt. 5. Pteridrophytes, pt. 6. Flowering plants, pt. 7. Insects, pt. 8. Freshwater Fishes, pt. 9. Amphibians, pt. 10. Reptiles, pt. 11. Birdd and pt. 12. Mammals.