[Vor. 5 
218 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
resultant body from the so-ealled aplanospore of Bornet and 
Flahault and that described by me as originating from a zo- 
ospore is the same thing. It will be recalled, however, that 
Bornet and Flahault never saw the discharge of either the 
zoospores or aplanospores, nor did they observe the germina- 
tion of the small zoospores deseribed by them. It would 
therefore seem possible that the so-called aplanospores of 
Bornet and Flahault were nothing but zoospores which had 
come to rest. Plate 13, fig. 5, shows a few zoospores which, 
failing to eseape, rounded up and began the development of 
resting spores. These might easily be mistaken for aplano- 
spores. Certainly in all the material of G. lignicola which was 
examined under much more favorable cireumstanees than was 
possible by Bornet and Flahault, at no time was there the 
slightest indieation of the production of an aplanosporangium 
or anything which might be regarded as a true aplanospore. 
Furthermore, in the description of no other species of Go- 
montia is there given any evidence of the existence of aplano- 
spores, their presence in the genus being based apparently 
entirely upon the original account of Bornet and Flahault. 
It seems very doubtful, therefore, that aplanospores exist in 
any species of Gomontia. The authority for West's! state- 
ment that akinetes are found in Gomontia is apparently based 
upon Chodat's account of G. codiolifera; at least he cites a 
figure from Chodat as an example of akinete formation. 
Chodat called this figure an example of ‘‘états Codiolum 
deviennent finalement des zoosporanges.’’ It is without doubt 
a resting spore developed from a zoospore, and, so far as 
known, there is no justification for considering akinetes as 
udin in any species of Gomontia. 
Gomontia lignicola Moore, n. sp. 
Type: in Mo. Bot. Gard. Herb. 
Filaments usually simple, rarely branched, not radiating 
from a common center; a single parietal chloroplast much 
reticulated, usually most abundant in apical cell; numerous 
pyrenoids; 1-6 nuclei; mature cells 95-45 шіп width, 100-200 
p in length; zoosporangia typical for the genus; zoospores 
! Algae 1: 305. 1916. 
