144 Blackman and Tans ley. 
parietal plate with one pyrenoid. The lateral tubular 
outgrowth may apparently sometimes function as a 
zoosporangium, opening at its apex. 
[The presence of a central row of stainable granules along the axis 
of the seta is the only evidence of its having possessed a lumen.] 
2. Dicoleoit. Klebahn, 1893. 
Thallus epiphytic, discoid, consisting of a clustered 
moniliform branch-system, clothed by a thin mucila¬ 
ginous tubular sheath. Cells globular, some bearing 
a single seta with a unique double sheath ; the 
outer sheath being short, and the inner one much 
longer. Reproduction unknown. 
3. Conocliaete. Klebahn, 1893. 
Cells globular, not united into filaments, but clustered 
irregularly within mucilage to form an epiphytic disc. 
Each cell bears several very long and fine sheathed 
filar processes on its free surface. Chloroplast a 
single parietal plate with one pyrenoid. Zoospores 
(4-8) may arise in an enlarged cell and escape by a 
short tube. 
(To be continued .) 
I>. 3MADLEY, Printer, 151, Whitfield Street, W. 
