124 G. LINDSTRÖM, HELIOLITID/E. 



Plasmopora scala n. p. 84. 

 Fig. 27, 28. Sections of a specimen from the stratum a near Wisby. "A- 



Plasmopora stella n. p. 83. 

 Fig. 29, I — VII. A series of transverse sections to demonstrate the coenenchymal gemraation. ''/i. 



