518 
CLIFFORD DOBELL. 
no central granule; and the pseudopodia of Monobia, 
Myxa strum, and Camptonema are so different in various 
ways from those of the form under consideration that it is 
impossible to place it in any of these genera. There is no 
genus which combines the characters peculiar to my organ- 
isms — namely, pseudopodia with axial fibres rooted in a 
central granule ; a single nucleus ; no contractile vacuole ; 
no distinct ectoplasm and endoplasm ; no stalk. 
It therefore appears necessary to introduce new generic 
and specific names for the present form, and I propose to call 
it Oxnerella 1 maritima, n. g., n. sp. It will be seen, I 
think, that Oxnerella bears much the same relation to 
Gy mnosp h sera that Actinophrys does to Actino- 
sphserium; for Actinophrys is like a uninucleate Ac- 
t inospliaeriu m just as Oxnerella is like a uninucleate 
Gymnosphaera. 
3. Habits, Habitat, Etc. 
Of the habits of Oxnerella little need be said, for it does 
not differ in any important ways from many familiar Heliozoa. 
A few points are worth noting, however. 
As the organisms occurred in cultures, I can only describe 
their behaviour in these ; and it is possible that in nature 
their habits are different. Nevertheless, they appeared so 
healthy and normal that I do not suppose the differences can 
be very great. 
The animals often float freely in the water, but display a 
special predilection for the surface film. Many of them were 
always to be found also at the bottom of the culture -tanks 
and on the sides, and in these situations they were generally 
more or less firmly attached by their pseudopodia to the 
substratum. When the cultures were well stocked, the 
organisms could be “ fished ” with a pipette at all levels, and 
were found attached to all the objects (algse, stones, etc.) in 
1 In honour of my friend, Dr. Mieczjslav Oxner, of the Musee 
Oceanographique, Monaco. 
