PLATE VII. 



Fig. i. Scirpearella gracilis W. and S. Fairly large colony, with calyces on all sides. Natural size. 

 i •!. part of colony ;. 

 ; anti 4. Smaller colonies of the same species, with alternate calyces. Natural size. 3^, part of 

 colony ;. 

 5. A very young colony, same species, with very regular lateral and alternate calyces. 



