OUVFpSfTT OF HLWCIS LISItAjfT 
FEB 18 1922 
Notes on some Scandinavian Echinoderms, 
with descriptions of two new Ophiurids. 
By 
Dr. Th. Mortensen. 
The preparation of the volume on the Echinoderms for the 
work „Danmarks Fauna“ has made it a necessity for me to enter 
on several questions, systematic or nomenclatorial, concerning some 
of the Echinoderms of our seas. The said work being of a more 
popular character and in the same time written in the Danish 
language I deem it my duty to publish in a separate paper, partly 
the description of a pair of new species of Echinoderms from the 
Scandinavian seas, partly a few critical notes on some of these 
species, relating now to their specific characters, now to nomen¬ 
clatorial questions connected with them. 
The notes here given have mainly reference to the Ophiurids. 
That no Holothurian is mentioned in this paper needs not mean 
that I have nothing to say regarding that group. It is in the first 
line due to the faet that I have not yet. had the opportunity of 
working up the Holothurians for the said work. But, in any case, 
I have thought it proper to publish these notes without any further 
delay. 
1. Ophioscolex purpureus Duben & Koren (Fig. 1). 
Recently Grieg has come to the result that this species can- 
not really be distinguished from 0. glacialis M.&Tr. but that it is 
nothing but a smaller boreal variety (or racial form — „Avæn- 
dring* — of the more robust arctic species O. glacialis l ). The result 
l ) See especially: James A. Grieg. Bidrag til kundskapen om Hardan- 
gerfjordens fauna. Bergens Museums Årbok 1913, 1, p. 125—30. Also 
the same authors: Sognefjordens Echinodermer. Arch. f. Math. & Natur¬ 
vid., XXXII, Nr. 11, 1912, p. 8. 
