BRANCHIOCERIANTHUS IMPERATOR (aLLMAn). 259 



must take the name Branchiocerianthus '^'' first given by Mark, 

 and our specimen then ought to be known as 



Branchiocerianthus imperator (Allman). 



P.S. We shall await with interest the full report on the 

 specimen of 3Ionocaulus obtained by Prof. Ciirx in his recent 

 deep-sea expedition ('09). 



December, 1899. Zool. Institute, Science College, 



Imperial University, Tokyo. 



*Maek ('99) mentions that Rhizonema carnea of S. F. Clarke ('76) may be a form same 

 as, or closely related to, Branchiocerianlhus. Clarke's original description is very brief and 

 it is impossible to determine wl'.ether Mark's suspicion is correct or not. At any rate, 

 Clarke makes no mention of anv bilateral svmmetrv in the structure of the animal. 



