63 
II. 
In the summer 1917 I had a stay at the Fresh-water biological 
laboratory at Suserup for which I am much indebted to the Di¬ 
rector, Dr. Wesenberg-Lund. It was my intention to study the 
Nematode-fauna of some of our lakes, localities which I had hitherto 
not had the opportunity of examining. 
Unfortunately I had not the full advantage of my stay which I 
was obliged to interrupt before the time on account of ill-helth. 
But as till now I have had no 'opportunity to resume my invest- 
igations rationally, I have found it suitable to impart communic- 
ation of different species of land- and freshwater forms which I 
have met with in Suserup and in other localities during the last 
years. 
The following species mentioned are all new to the Danish fauna 
with the exception of Chromadora Orleyi. 
Aphanolaimus aquaticus Daday. 
This interesting form was first taken in Ungarn and described 
by v. Daday. Later on it was known from the East Alps and 
from Bukowina (M i c o 1 e t z k y), from Switzerland, where it was 
taken in the lake of Geneva (Stefansky) and in mosses from 
the High-Alps (Menzel). Furthermore it was recorded from South- 
Africa, Sambesi (Micoletzky). It thus proves to be a species 
with a wide geographical range. 
During my stay at Suserup a single male specimen was capt- 
ured in the lake of Tjustrup-Bavelse. It was found in bottom 
material, and in spite of earger searching I did not succeed in 
finding any more. 
The Danish specimen agrees rather well with the copious de- 
scription by Micoletzky. As to the preanal papillæ I shall State 
as following. There are nine in all; in shape the chitinous duets 
differ somewhat from those in the figure of Micoletzky. While in 
the latter the named duets are seen as perfeetly straight rods the 
same organs are in Danish specimen slightly curved and pro- 
vided with a little, but plainly observable knoblike dilatation in 
their proximal end. — It is perhaps a question, whether these 
papillæ are to be called so or not more correctly supplementary 
