EXPLANATION OF PLATE XXXIX. 



Diplujphyllum gemmiformis, Eth, fil. 



Fig. 1. Transverse section of a corallite, exhibitinf,' the septal and tabulate 

 areas. In the former the interseptal loculi are seen to be filled 

 with both forms of tissue. In the latter, cut edges of tabulaj are 

 visible, x'4. 



,, 2. Longitudinal section exhibiting the peripheral vesicles, and the 

 tabulae, x 4. 



Cystiphyllum (? Microplasma) australasica, Eth. fil. 



,, 3. Transverse section of a'corallite. A few septal spines are visible, x 4. 



,, 4. Transverse section of a corallite with very large central vesicles. 

 Around the edge are the conjoined thick protuberances, x 4. 



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



