438 The Botanical Gazette. [October, 
able that this takes place by means of zoospores of the usual 
*, 
The zoospores, which are very rarely produced in MM. zn- 
stgnts but are found more commonly in M. fasciculata, are 
more than twice as large as the antherozoids. According to 
Cornu the zoospores resemble the antherozoids in all respects 
except in size; but, although the writer has not thoroughly 
satisfied himself on this point in his examination of fresh ma- 
terial, stained preparations of the zoosporangia of MM. fasct- 
culata show distinctly two cilia on zoospores which had not as 
yet escaped when the preparation was made (fig. 12). In both 
of the present species, as is also frequently the case in &@. 
polymorpha, the zoosporangia resemble the oogonia in all re- 
spects (figs. 7, 11, 12) and are formed in exactly the same way, 
usually in connection with an antheridium. The long clavate 
sporangia, however, which are also characteristic of J. poly- 
morpha, have not been observed in either of the new species. 
After the escape of the zoospores a large oil globule always 
remains within the sporangium. Further details concerning 
M. polymorpha and the additional species above referred to 
are withheld for the present. The two remaining forms may 
be characterized as follows: 
Monoblepharis insignis, nov. sp.—Hyphe straight, rigid, 
hyaline or very pale reddish brown, nearly cylindrical, rarely 
branched, 1.5-2.5"" in length by 8—1 5 in diameter. Anthe- 
ridia broad, subconical to subcylindrical, straight or slightly 
divergent, the rounded tip often bent slightly inwards, nearly 
symmetrical or often with the base irregularly protruded on 
its inner side. Antherozoids numerous (about 24-32), 1-cili- 
tips of the hyphe, irregular in form. Zoosporangia rare, 
similar to the oogonia; zoospores 2-ciliate (?), about 10-12y in 
diameter. 
On submerged sticks in pools and ditches, Weston and 
Medford, Mass. , and Kittery Point, Maine. : ; 
This species appears not to be uncommon and is conspicu- 
mentioned, and on account of its greater dimensions is better 
adapted than either of the much smaller remaining species to 
