EXPLANATION OF PLATE XL. 



Diphyphyllum gemmiformis, Eth. fil. 



Fig. 1. Transverse section of a corallite, with a comparatively small amount 

 of tissue in the interseptal loculi. x 4. 



Desmidopora nicholsoni, Eth. fil. 



„ 2. Transverse section of part of a corallum exhibiting the characteristic 

 calices. x 4. 



Cystiphyllum ( ? Microplasma ) australasica, Eth. fil. 

 ,, 3. Longitudinal section (in part) of a corallite. x 4. 

 „ 4. Transverse section of a corallite. 4. 



[Reproduced from microphotographs by Mr. E. R. Waite.] 



