22 



Plate III. 



COSCINOCYATHUS TaTEI, SJ). VOV. 



1. A mass of light grey to cream-coloured limestone with portions of the 



septal areas as cut at various angles. Wirrialpa. Nat. 



2. Transverse section of a large corallum showing the septal area, and 



inner perforated lamina. Ardrossan. Nat. 



3. The same example seen partly in oblique-horizontal, and partly ol)lique- 



vertical natural fractured sections, with the septal area, inner per- 

 forated lamina, and an external tissue, which may perhaps repre- 

 sent the outei- perforated lamina. Ardrossan. Nat. 



4. Three septa and inner perforated lamina of fig. 2 ... ... x 5. 



5. Portion of a naturally weathered specimen, showing the outer ends of 



the septa seen longitudinally, covered by a portion of the outer per- 

 forated lamina. Kanyka. Nat. 



6. Five septa of fig. 5 to show the interpolation of new septa by bifurca- 



tion, and the perforations of the outer lamina arranged in from 

 three to four perforations to each septum ... ... ... x 3. 



7. A small portion of the septal area of another specimen with remains of 



the cribriform interseptal tissue. Wirrialpa ... ... x 5. 



8. Fragment of another example with the inner ends of six septa exposed 



and partially covered ])y the inner perforated lamina. Wirrialpa 



x 2. 



Ethmophyllum Hindei, sjh nov. 



9. Transverse section of a corallum. Wirrialpa. Nat. 



10. A small M'eathered corallum seen partly horizontally, partly in verti- 



cal or longitudinal section, to show the central plug of matrix and 

 limited nimiber of septa. Kanyka X 2. 



