PLATE VI. 



Fig. i. Scirpearella rubra W. and S. Large red colony. Natural size. ia, part of colony 



J. Scirpearella rubra. Smaller red specimen. Natural size. 



}. Scirpearella rubra. More slender, white form. Natural size. 

 Fig. 4. Scirpearella rubra. Small red specimen. Natural size. 



5. Scirpearella rubra. Young colony, white, with opposite calyces. Natural size. 



