Group I | Group II | ||
P | Pedicle Foramen | 1 | Trilobita |
Q | Pallial Sinus | 2 | Cephalopoda |
R | Pygidium | 3 | Pelecypoda |
S | Siphuncle | 4 | Brachiopoda |
Group I | Group II |
P. Dissepiment | 1. Echinodermata |
Q. Delthyrium | 2. Trilobita |
R. Pygidium | 3. Brachiopoda |
S. Ambulacrum | 4. Anthozoa |
Group I | Group II |
P. Sillimanite | 1. First order |
Q. Quartz | 2. Second order |
R. Muscovite | 3. Greater than third order |
S. Calcite | 4. Third order variegated |