90 Proceediugst of the Royal Society of Victoria. 



by this author^ and Uli'ich,^it does not appear to agree specifically 

 with any of the forms described by them. It is to be hoped 

 that more perfect specimens will be available for detailed 

 examination. 



No specimens of Monticuliporoids have hitherto been described 

 from Silurian or Devonian Rocks in Australia, though the 

 genus Steiwpora is very abundant in the Pernio Carboniferous 

 rocks of New South Wales, Queensland and Tasmania. 



The senus occurs in the Lower Silurian-Devonian of North 

 America, and the Lower Devonian of Europe. 



PLATE III 



Fig. 1. Pleupodictyum (? megastomum, McCoy, M.S.) 



• Kilinore. 

 Fig. 2. Pleurodictyum. Mansfield. 



Fig. 3. Cyathophyllum mansfieldense, Dun. Longitu- 

 dinal section, x -',. ^Mansfield. 



Fig. 4. Cyathophyllum mansfieldense. Transverse sec- 

 tion, X %. Mansfield. 



Fig. 5. Cyathophyllum elegantulum, Dun. Transverse 

 section, x 2. Mansfield. 



Fig. 6. Cyathophyllum elegantulum. Longitudinal sec- 

 tion, X 2. Mansfield. 



Fig. 7. Petraia, sp. Kilmore. 



Fig. 8. Petraia, sp. Mansfield. 



Fig. 9. Favosites gothlandJca. Portion of surface showing 

 corallites. Natural size. Mansfield. 



1 On the Structure and Affinities of tlie Genus Montioulipora, etc., 1881, pp. 102, 170. 



2 Geol. Survey Minnesota, 1895, iii., pt. i., p. 303. 



