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organs. In the form under consideration the chitinized “rods'’s are 
in my opinion efferent duets for giands or perhaps a glandular 
syncytium having its place in the body-eavity. In the figure by 
Micoletzky this glandular mass is plainly seen and Micoletzky 
mentions it in the text as “eine driisige Partie”. It is in my 
opinion difficult to see any essential difference between these pa- 
pillæ in Åphanolaimus and the corresponding organs in the males 
of other freeliving Nematodes, f. i. Seuratiella or Parasabatieria 
ornata ; in the latter I have stated the presence of a similar glan¬ 
dular syncytium. Perhaps the supplementary organs in such genera 
as Enoplolaimus, Thoracostoma and Phanoderma are more highly 
differentiated, but also in these forms they seem to be homologous 
organs; in the last named genera they are hitherto only found 
single. 
Chromadora Ratzeburgensis Linst. 
In the lake of Tjustrup-Bavelse were found two species of 
Chromadora both exceedingly common, namely C. Oleyi d. M. and 
C. Ratzebur gensis Linst., the last named new to the Danish fauna. 
The æcological behavior of these two species is mainly the same 
and their occurrence in the different bioeænoses mainly the same. 
I have noted the following: 
C. Orleyi : In chalk on Potamogeton lucens-leaves, in Spongilli, 
in chalk on stones at the shore (Krustenstein of Micoletzky), 
mud on Unio-shells. C. Ratzeburgensis : In the bottom near the 
shore, in chalk on Potamogeton lucens-leaves, in chalk on stones 
at the shore, among Algæ on Nymphæa (Aufwuchs of Micoletzky). 
In his important paper dealing with the freeliving Nematodes 
of the East Alps H. Micoletzky States that C. Ratzeburgensis oc- 
curs in the „Attersee“ „als dominierende Uferform“ and „in allen 
untersuchten Biocoenosen aufgefunden“. It is interesting that the 
same is practically the case with the same species in the lake of 
Tjustrup-Bavelse in Denmark, and also proves to hold good for the 
closely related form C. Orleyi , at any rate at that time in which I 
had an opportunity of investigating the conditions in this respect. 
