98 Ghose. — A New Species of Uronema from India, 
of a filament, about 28 \x thick, in which some cells are forming septa, while 
others are empty. 
The alga resembles Uronema elongatum very much, but differs from it 
in its comparatively greater size, in the chloroplast running through the 
whole length of the cell, and in the cells being generally broader than they 
are long. For these reasons I propose to give the alga a separate specific 
name, and term it Uronema indicum. 
Diagnosing characters of the new alga : 
Uronema indicum , sp. n. Filaments not enclosed in a mucous sheath, 
unbranched, straight or a little curved, up to 8 mm. in length. Basal cell 
attenuated and fixed by a mucous disc. Apical cell acuminate. Other 
cells cylindrical, generally 16-22 ju, thick, but attaining a thickness up 
to 40 /u, while forming zoospores. Chromatophore single, parietal, band- 
shaped, running through the whole length of the cell and passing round 
two-thirds of the circumference, with incised edges. Pyrenoids up to four 
in each cell. Nucleus single, median. 
Propagation by means of 4-ciliate zoospores, about ioju in diameter, 
produced singly from one cell, or in a number from it after its forming 
transverse and longitudinal septa. 
Habit. Found in Lahore, India, sticking to the walls of a dirty drain 
in the months of March, April, and May, 1919. 
EXPLANATION OF FIGURES. 
Figs. 1-2. Basal parts of two filaments, showing the elongated basal cell with the rounde.d 
mucous disc, x 500. 
Fig. 3. A complete filament, showing the beginning of septation in cells, x 500. 
Fig. 4. A young filament, showing swellings at the joints, x 500. 
Figs. 5-9. Apical parts of filaments, showing various forms of apical cells, x 500. 
Fig. 10. Part of a vegetative filament, showing the chloroplast nucleus and pyrenoids in its 
cells, x 500. 
Fig. 11. A medium-sized filament, showing the beginning of multiseriate structure, and some 
empty cells from which zoospores have escaped, x 500. 
Fig. 12. Part of a filament, showing the escape of zoospores, x 500. 
Fig. 13. A zoospore, showing four cilia and numerous scattered starch grains, x 800. 
Fig. 14. Three zoospores germinating together, with confluent basal discs, x 500. 
Fig. 15. Part of a large filament packed with zoospores, x 600. 
