DESCRIPTION OF PLATES. 161 



PLATE IX. 



1. Microporella malnsii. 



2. Microporella rudis. 



3. Microporella ciliata, 3a single zooecium, shewing pore and avicularium. 



4. Adeona cellulosa, natural size, 4a portion magnified. 



5. Adeona grisea. 



6. Adeona grisea, var. inter digitata. 



7. Adeona obliqua, natural size. 



8. Adeona obliqua, portion of another specimen magnified, 8a edge view shewing 



vicarious avicularia, 8b posterior view two zooecia. 



9. Adeona obliqua, another specimen. 



10. Adeona obliqua, another specimen. 



11. Adeona obliqua, another specimen, 11a posterior view of single zooecium. 



12. Adeona symmetrica, natural size, 12a magnified. 



13. Adeona mucronata, natural size, 13a magnified. 



14. Adeona mucronata, another specimen, shewing numerous avicularia. 



15. Adeona clavata, natural size, 15a magnified. 



16. Adeona clavata, another specimen. 



17. Adeona clavata, another specimen. 



18. Adeona clavata, another specimen, natural size, 18a magnified, 186 thyrostome 



more highly magnified, shewing commencement of avicularia. 



19. Tessaradoma magnirostris, group of zooecia, 19a single zooecium more highly 



magnified. 



20. Tessaradoma elevata, 20 posterior view of three zooecia. 



21. Hiantopora liversidgei, natural size, 2 la magnified. 



22. Hiantopora liversidgei, var. porosa, natural size, 22a magnified. 



23. Adeonella triton, shewing ocecia, 23a three zooecia, one shewing oral denticles. 



