8 Howe: MONOSPORANGIAL DISCS IN LIAGORA 
13. A later stagein the development of a disc, but showing a shorter root-hair 
(No. 4778d). XX 620. 
14. An older stage, with long root-hair and with suggestion of a short stalk at 
one edge, eters origin of the disc from a two-celled gemma as shown in Figures 7 
and 8 (No. 4778d). XX 272. 
15. are sal view of a young disc, suggesting discs of species of Erythrotrichia and 
isicodaiia but apparently belonging in the present series (L. valida, No. 4778c). 
X 510. 
16. A later saucer-shaped stage, seen more or less edgewise, and showing three 
hairs springing from the dorsal surface in its thicker central part and one root-hair 
from its ventral surface (L. valida, No. 4778c). XX 272. 
17. Dorsal view of a nearly mature disc with two monosporangia. The dorsal 
hairs have deliquesced or are so very inconspicuous that no attempt has been made 
to represent them. The dotted outer line indicates boundaries of the peripheral 
mucus or gelatinized outer walls. (L. valida, No. 4778c). XX 350 
cer eres No. 47784—edges of disc > less mcmbecuiet than in L. valida). X 272. 
_ y filament of L. farinosa 
(No. 4775). X 375. 
20. A free aplanospore from the same plant (No. 4775). 375- 
21. A young disc of L. farinosa (No. 4775) in ventral view, showing first root- 
hair. XX 620. 
22. Another young disc in obliquely ventral view (No. 4775), showing base of 
first hair from dorsal surface and first root-hair. 620. ; 
23. Amature or nearly mature disc of L. farinosa (No. 4775), in lateral view, 
showing the more or less protuberant monosporangia. The dotted line’ indicates the 
boundary of the mucus envelope, which, in the natural state, is lightly permeated 
with lime. Only about one third of the length of the dorsal hairs is shown. 27? 
24. Obliquely dorsal view of a mature or nearly mature disc of L. pinnate 
(No. 4776), with monosporangia, etc. XX 272 
