354 
Davis. — Champia parvula , Harv. 
Fig. 8. Last stage in segmentation of the spore ; 44 cells ; viewed from the 
side ; glycerine preparation, specimen -08 mm. 
Fig. 9. Side view of young plant *15 mm. long; glycerine preparation. The 
cells are numbered to indicate probable homologies with Figs. 7 and 8. 
Fig. 10. A series of transverse sections of a young plant .10 mm. long; ten 
sections in the series, eight shown ; the four divisions of the young plant included 
between the straight lines drawn across the sections; initial cells numbered 1, 2, 
3, 4 ; stained with alum-carmine, x 250. 
Fig. 11. First two sections of a young plant -15 mm. long; primary initial cells 
numbered 1, 2, 3, 4; stained with Bismarck-brown, x 250. 
Fig. 12. Tip of young plant *17 mm. long; cells numbered 1, 2, 3, 4, the 
primary initial cells; 5 and 6 probably would soon be initial cells; stained 
with Bismarck-brown, x 250. 
Fig. 13. Series of four sections of a young plant -30 mm. ; initial cells 
numbered 1, 2, 3, 4, 5, perhaps also 6, 7, 8, 9. In sections b , c, and d are seen 
cross-sections of hyphae ; stained with Bismarck-brown, x 250. 
Fig. 14. Optical section of the last stage in segmentation of spore; from same 
specimen as Fig. 8 ; -oS mm. long, x 450. 
Fig. 15. Longitudinal section of young plant -20 mm. long; x and x 1 initial 
cells ; stained with Bismarck-brown, x 450. 
Fig. 16. Longitudinal section of young plant -25 mm. long; x and x 1 initial 
cells, the corresponding segments numbered ; the hyphal cells lettered h ; stained 
with alum-carmine, x 500. 
Fig. 17. Longitudinal section of young plant -32 mm. long; x and x 1 initial 
cells ; h, hyphae which have crept down on the inside of frond : d , diaphragm ; 
stained with alum-carmine, x 500. 
Fig. 18. Longitudinal section of young plant *28 mm. long; segments and 
initial cells numbered and lettered as in Figs. 16 and 17 ; d 1 , first diaphragm; d 2 , 
second diaphragm just forming ; b, bulb-cell on its hypha h ; stained with alum- 
carmine. x 500. 
