Pt. 1. Trilobita, by M. V. A. Sastry and V. D. Mamgain.
pt. 2. Coelenterata, by M. V. A. Sastry and N. K. Sinha.
pt. 3. Echinodermata, by M. V. A. Sastry and N. K. Sinha.
pt. 4. Decapod Crustacea, by M. V. A. Sastry and U. B. Mathur.
pt. 5. Bryozoa, by M. V. A. Sastry and P. R. Chandra.