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URONEMA ELONGATUM 
A NEW FRESHWATER MEMBER OF THE ULOTRICHACE^E. 
By William J. Hodgetts, B.Sc. 
[With Eleven Figures in the Text]. 
HIS filamentous alga was originally found in February,1918,in a 
small pond near Staplehall Farm, King’s Norton, Birmingham. 
It remained rather common until April, being always epiphytic 
either on a large Oedogonium sp., the leaves of Myviopliyllum, or 
Lemna minor roots, and mixed with various filamentous forms 
(e.g ., sterile Mougeotia spp., Oedogonium spp., Spirogyra tenuis- 
sima, Ulothrix subconstricta West, etc.) which were fairly abundant 
amongst submerged grass-leaves, ete., on one side of the pond 
which was shallow and marshy. Possibly owing to a contamination 
of the water in the early part of the spring—which probably 
accounted for the great dominance of Euglena sanguinea Ehr. in 
the pond during the middle of May—the Uronema, and also the 
other filamentous algae, decreased greatly in abundance and became 
rather rare towards the end of April and in May. Since the alga 
differs in many respects from both Uronema confervicolum Lagerh. 
and Uronema (?) simplicissimum (Reitisch) Lagerh., the only species 
