(This is a Grantia Sponge) 1. Radial Canal 2. Dernal Ostium 3. Incurrent Canals 4. Spicules 5. Osculum 6. Prosopyle 7. Apopyle 8. porocytes 9. Choanocytes 1. Radial Canal 2. Dernal Ostium 3. Incurrent Canals 4. Spicules 5. Osculum 6. Prosopyle 7. Apopyle 8. porocytes 9. Choanocytes.