1918] 
MOORE—GOMONTIA LIGNICOLA, N. SP. 215 
small one, was observed. The direct germination of the large 
zoospore is, however, described. 
Wille! definitely detected four cilia in zoospores of G. 
polyrhiza. The sporangia from which these came, however, 
ean hardly be regarded as typical, since they were only about 
15 ріп diameter and but from two to four zoospores were pro- 
duced in a single sporangium. 
The zoospores of no other species have been satisfactorily 
deseribed and various authors have given the number of 
cilia for the genus as either two or four, according as to 
whether they followed Bornet and Flahault or Wille, or as 
in some instances regarding the biciliate spores as gametes 
and the quadriciliate as true zoospores. 
All of the motile spores seen from the plants of Gomontia 
lignicola possess but two cilia (pl. 18, fig. 3). Because of the 
above described method for obtaining these spores an unusual 
opportunity was afforded to examine zoospores before, dur- 
ing, and after discharge. "Thousands were seen and hundreds 
stained with weak iodine, which was sufficient to demonstrate 
the cilia. In no ease was there the slightest indication of 
more than two cilia. Neither was there any marked differ- 
ence in size as described for G. polyrhiza. The contents, how- 
ever, of the zoospore of G. lignicola corresponds well with 
that of С. polyrhiza, having the single pyrenoid, a basal 
chloroplast, and the distinct red spot described for that 
species. 
The possibility of Gomontia being one of the genera which 
possess a quadriciliate zoospore and a biciliate gamete has, 
of course, been recognized from the first. There is no ac- 
count, however, of conjugation being seen, and the existence 
of gametes in Gomontia is based upon analogy rather than 
upon observation. So far as G. lignicola is concerned it can, 
I think, be regarded as highly improbable that gametes occur, 
at least it is certain that the biciliate bodies observed function 
as true zoospores. The fact that at least several hundred spo- 
rangia were from time to time observed discharging zoospores 
die Zoosporen von d боды (Lagerh.) Born. et Flah. 
Norske Videnskab. Selsk. Skrif. 1906*: 
