30 G. LINDSTEÖM, HELIOLITIDJE. 



gemmation, and also in some degree of their coenenchyma. They have indeed by sorae 

 authors been mistaken for and described as true Heliolitidte. 



As to the affinities of these groups with other corals I cannot at present find any 

 other palaeozoic allies. In regard to the often pretended proximity of the Favositid^ 

 and the Heliolitidas I have tried to show further on, in the description of Heliol. deci- 

 piens that there exist fundamental dissirailarities between these two groups. 



