

Plate 9 



Fig. 1 



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it 



a 



a 



a 



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tt 



cc 



tt 



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7. 

 8. 



Eurete erectum gracile. Gastral scopula; x 450. 



2. Sclerothamnopsis compressa. From a photograph ; \. 



3. Eurete erectum gracile. Gastral scopula ; x 450. 



4. Sclerothamnopsis compressa. From a photograph ; two of the smallest branches 



shown ; x 2. 



5. Eurete erectum gracile, From a photograph ; -}-. 



6. Sclerothamnopsis compressa. Pinulus; x 170. 



« 



« 



it 



a 



Oxyhexaster; x 250. 



Upper end of scopula ; x 250. 



9. fiegadrella, sp* Skeletal framework ; from a photograph ; |J. 

 10. Sclerothamnopsis compressa. Spinose hexact ; x 170. 

 11. 



Skeletal reticulum ; from a transverse section. 

 Upper margin of figure represents surface of 

 sponge ; x 70. . 









