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SUMMARY OF CURRENT RESEARCHES RELATING TO 
Scypliozoa 
Corals 
Hexactinia 
Hydrozoa 
Edivcirdsia 
Cereanthus 
Antipathic!® 
Ctenophora 
Alcyonaria 
Scyphomedusae 
4-radiate Scyphistoma 
Scyphula 
Planula 
Development of Mesenteries in Actiniae.* — Herr Oscar Carlgren 
describes this process in a peculiar anemone found in the Chinese and 
Japanese seas, which he regards as the type of a new genus and a new 
family. This peculiar form, to which he assigns the generic name of 
Endocoelactis , has both tentacles and mesenteries arranged in circles of 
irregular numbers, tentacles 18 + 10-(-16 -f- 8 + 16 = 68, mesenteries 
10 (with two directive mesenteries) -f 8 + 16 = 34. In the development 
of the mesenteries it was found that for a long time these arise after a 
bilateral method. According to the author, in the Actiniae in general the 
radial type of development appears sooner in the higher forms than in 
the lower. For this and other reasons Endocoelactis must therefore be 
placed low among the Actiniae. 
* Ofversigt Vctensk.-Akad. Forliandl., liv. (1897) pp. 159-72 (5 figs.). 
