1'28 G. LINDSTRÖM, HELIOUTIU.E. 



Plnsmopora rudis n. ]>. 85. 



Fig. 27, 28. Sections of specimen from Sandarfve Fig. 31. Portion of interiör calicular wall, showing 



IvuUe. *'i. thc rounded septal lists covered with mi- 



» 29, 30. Sections of specimen, typical, from Helvi. nutc grauules and crossed by fragments of 



Vi. the tabute. V»- 



Plasmopora helioUtoides ii. p. 86. 

 Fig. 32, 33. Sections of specimens from Östergarn. ''/i. 



Plasmopora? reticulata n. p. 87. 



Fig. 34. Part of the surface, nat. size, specimen from Fig. 36, 36. Sections of the same. Vi- 

 the Arachuophyllum stratum of Wisby. j 



