ERYOZOA PROM AUSTRALIA. 443 



making genera, I would call attention to a method which Messrs. Gabb 

 and Horn have unconsciously hit upon, as upon one plate the 

 same species is figured right way up and upside down, thus giving 

 two good genera. 



I am not sure that this ought to be separated from S. marginata, 

 Woods. 



EXPLANATION OF PLATE XII. 



Fig. 1. Catenicella lesvigata, sp. nov., X 25. 

 2, 3, 4. longicollis, sp. nov., X 25. 



5. Harveyi, Thorns., X 25. 



6. ponderosa, Goldst., recent, showing the protecting plate, x 25. 



7. Selenaria maculata, Busk, fossil, X 25. 



8. initia, sp: nov., X 25. 



9. maculata, Busk, recent, X 25. 



10. Smittia collaris, var., X 25. 



11. Lumilites petaloides. Apertures of central zooecia, closed by subsequent 



growth, X 85. 



12. Selenaria maculata, Busk. Diagrammatic, showing grain of sand on 



which it grew. 



13. Eetepora marsupiata, Sm. Dorsal surface. 



14. Smittia Napi&rii, sp. nov., x 25. 



15. 16. Catenicella alata, Thorns., X 25. 



17. Cribrilina terrninata, Waters, X 25. 



18. Cellepora granum, Hincks, var., X 25. 



19. Membranipora arethusa, d'Orb. v X 25. 



20. lusoria, var. coarctata, X 25. 



21. Eetepora marsupiata, Sm , x 25. 



22. Membranipora oculata, Busk, X 25. 



