Epithetosoma not a Gephyrean but an Indeterminable Heteronemertine. 5 
tosoma norvegicum Dan. & Kor. from station 190 of the 
Norwegian North-Atlantic Expedition. At the first glance, as 
was expected, it appeared to be a true Heteronemertine. 
Although I was fully convinced of the correctness of my 
determination, I cut out a piece of the specimen and made 
microtome sections to test this. An examination of the sections 
removed all doubts as to the true nature of Epithetosoma as 
a Heteronemertine. 
Of course it is quite unnecessary to show in detail all 
the mistakes made in the first description of the animal. 
I think that Epithetosoma has already caused too much dis- 
cussion and we may surely now look upon the matter as 
settled and that this animal is a member of the Lineidae. 
As the specimen is badly preserved, as Danielssen and 
Koren already state (l.c., p. 43), I find it impossible to 
determine the species to which it belongs. I think, however, 
I am right in saying it is a Micrura. 
At all events my examination proves irrefutably the cor- 
reciness of Théel's opinion: that Epithetosoma has nothing 
to do with the Gephyreans and is a true Nemertine. 
The generic name Epithetosoma must also be dropped, as it 
is certain that this Nemertine does not form a separate genus. 
