JOURNAL OF THE COLLEGE OF SCIENCE, IMPERIAL UNIVERSITY, 

 TOKYO, JAPAN. 



VOL. XVII., ARTICLE 9. 



Studies on the Hexactinellida. 



CONTRIBUTION II. 

 (The genera Corbitella and JleterofeUfi). 



By 



Isao Ijima, Rig., Ph. D., Rig. -Hah., 

 Professor of Zoology, Imperial University, Tokyo. 



With one plate. 



While in Paris in the early part of this year, I was enabled, 

 through the courtesy of Professor Edmond Perkier and the 

 friendly assistance of Dr. Ch. Gravier, to examine, amongst 

 other things, the old types of Corbitella speciosa (Quoy Gaimard) 

 and of Heterotella corbicula (Boyverbank). For the perplexing 

 history of our knowledge of these little known forms, the reader 

 is referred to a paper by F. E. Schulze foo). 



Another Euplectellid, Eudiclyum elegans Marshall, has 

 also long stood in need of re-examination as being closely allied 

 to, if not identical with, one or the other of the above mentioned 

 forms. On the occasion of a visit last year to Amsterdam, an 

 opportunity was given me of examining the type of Marshall ; 

 and subsequently, Professor Max Weber has kindly supplied 

 me with a sample of its tissues to make studies on. 



