74 Proceedings of the Royal Society of Victoria. 



the calcification of the front wall of the cell proceeded from the 

 margins to the centre and did not quite coalesce at the centre of 

 the proximal margin of the thyrostome forming the sinus, and 

 the depressed area below it may be owing to a low degree of 

 calcification. The two large circular pores below the thyrostome 

 are very conspicuous, and probably are either avicularian or 

 vibracularian. 



EXPLANATION OF PLATES VI., VII. and VIIL 



1. — Schizoporella nitidissima, n. sp. 



2. — S. vigilans (ooecia), Waters. 



3. — S. terebrata, n. sp. 



4. — S. convexa, M'G. (ooecia), 



5. — S. oralis, n. sp. 



6. — S. mamillata, n. sp. 



7. — S. pulvinata, n. sp. 



8. — S. hispida, n. sp. 



9. — S. subgranulata, n. sp. 

 10. — S. flabellata, n. sp. (zoarium). a. zooecia. 

 11. — S. fenestrata, Watei's. 

 12. — S. varabilis, n. sp. a. ooecia. 

 13. — S. chlithridiata, n. sp. 

 14. — S. anihigua, n. sp. 

 15. — Gemellipora auriculata, n. sp. 

 16. — Aspidostoma airensis, n. sp. a. ooecium. 

 17. — Cellaria incudifera. n. sp. a. hexagonal zooecia. I?, end of 



zoarium. 

 18. — Cellaria robusta, n. sp. 

 19. — Micropora carinata, Maplestone (ooecium). 

 20. — ? Lepralia bisinuata, n. sp. a. outline of thyrostome. 

 21. — Trypocella excavata, n. g. et. n. sp. 



All Figures x 25. 



