204 



6 



This he says is likewise found at Faxe. 



Parasmilia scanica Hng. 

 Ceratotrochus supracretacea Hng. 



Of the species we find again quoted in Ravn's^) hst of fauna: 



Dendrophyllia candelabrum, 

 Lobopsaminia faxensis, 

 Parasmilia Lindstromi, 

 — excavata. 



If we make a tabular comparison of these facts about Danish Zoantharia, we find 

 that until the present time only ten forms were known; of these only the six following have 

 been described: 



Parasmilia excavata, v. Hag. 

 Sphenotrochus lalus v. Koenen, 

 Trochocyathus calcitrapa v. Koenen, 

 Parasmilia Limlsiromi Hng., 

 Lohopsammia faxensis Beck., 

 Dendrophyllia candelabrum Hng. 



(See list, p. 7.) 



As may be seen, our knowledge of these Zoantharia is not very great. Only the species 

 which are underscored have been described and pictured, while the others are merely known 

 as names in a museum, and in a single case even this is doubtful. There is, for instance, 

 nothing in the collection to support Fischer Benzon's Astraea sp., for there is no coral from 

 Faxe of asteroid form. However, as Hennig too, claims to have observed "two imprints of 

 an asteroid form", we are forced to believe that there is some ground for the assumption. 

 It seems reasonable to suppose that specimens of Heliopora incruslans were meant, for 

 when the colony is well-covered with calcite this species readily resembles an asteroid coral. 

 All the other forms given in the list have been found to tally with the species in question. 



II. Anatomical Conditions. 



Great are the difficulties encountered in determining fossil corals from Danish 

 deposits. As a rule the coral is filled with mud or coated with calcite crystals both of which 

 efface and hide the details by which it is possible to determine the family, genus and species. 

 It often becomes necessary to cut through the coral, and only in more fortunate instances 

 in which the mud may be removed do all the characteristics become visible. 



') MiLTHERs: Kortbladel Faxe og Stevns. D. G. U. I Række. Khlivii., 19Ü8. 



