Norwegian Solenogastres. 
opinion is based are adduced in a comparative study set forth 
in an additional chapter on the affinities of the Solenogastres. 
The relative abundance of different forms displayed by the 
present group of animals on the Norwegian coast renders it 
probable that they may be less rare than is usually believed. 
That they, nevertheless, are so sporadically met with may be due, 
at least to some extent, to the fact that they easily escape atten- 
tion because of their habits. A careful examination of Alcyonarians 
and Hydroids, on which they generally feed, as well as of the 
bottom mud in localities where they have been found, will cer- 
tainly contribute to more abundant captures of these remarkable 
animals of which new representatives undoubtedly remain to be 
detected in northern and arctic districts. | 
On the other hand, it is conceivable that the Solenogastres 
may be, in reality, very scarce in individuals, and that the dis- 
crepancies proceeding from this circumstance with regard to their 
reproduction is compensated by their hermaphroditism. This may 
be supposed to render them capable, at least in some cases, of 
self-fertilization. This possibility may even be conceivable in the 
forms where copulatory organs exist, or where, as in Neomenia 
and Dorymenia, protandry has been established. In forms with- 
out copulatory organs — in most of them (Drepanomenia, Kruppo- 
menia, Anamenia) the genital products seem to come simultane- 
ously to maturity — self-fertilization is more likely. 
In the following a synopsis will first be given of all the 
forms of Solenogastres included in this paper, arranged systematic- 
ally; this is followed by a monographical section dealing with 
each species, its distribution and morphology; finally I give a com- 
parative treatment of the group with new points of view as to 
the systematical position and phylogeny of the Solenogastres. 
In the lists of localities given for each species the letters *B”, 
"Cc GS, ”K* and ”T“ signify respectively the Museums of 
Bergen, Copenhagen, Gothenburg, Christiania and Trondhjem. 
