190 Proceedmgs of the Royal Society of Victoria. 



raised margins, sloping inwards. Ooecia galeate, sniootli, with 

 slight radiating lines on the face. 



Locality. — Aire Coastal Beds (Messrs. Hall and Pritchard). 



The ooecium on the right hand lower part of the figure shows 

 a separate aperture ; in the others this part has broken away. 



DESCRIPTION OF PLATES XXIII. and XXIV. 



Fig. 1. Cellaria grandis. 



,, 2. Cellaria contigua (var. corioensis). 



,, 3. Melicerita elliptica 



,, 4. Cellaria gigantea. 



,, 5. Membranipora bellis. 



,, 6. Membranipora globulosa. 



,, 7. IMembranipora radicifera. 



,, 8. Membranipora aviculifera. 



,, 9. Membranipora longipes. 



,, 10. Membranipora regularis ("rt," side view). 



,, 11. Membranipora porcellana. 



,, 12. Amphiblestrum planulatum ("«," ooecium). 



,, 13. Amphiblestrum variabile. 



,, 14. Amphiblestrum sexspinosum. 



,, Wa. Amphiblestrum sexspinosum (with ooecium). 



,, 15. Amphiblestrum ovatuin. 



,, 16. Amphiblestrum moniliferum. 



,, 17. Amphiblestrum nitidum. 



