50 The Botanical Gazette. (February, 
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Among the material collected in one locality near Kittery 
Point, numerous plants were found bearing peculiar sporangia, 
proportionately much larger and more nearly oval than the 
ordinary forms, many of which contained large well defined 
rounded masses of protoplasm which at first suggested the 
presence of oospheres; but further examination showed them 
to be early conditions of the resting spores of a species of Ro 
zella parasitic on the Blastocladia, which, when mature, be 
came spherical, thick walled, and echinulate. 
The position of the genus among related forms is vey 
doubtful, and although in habit it resembles Rhipidium, whik 
its zoospores recall those of Gonapodya, there is no reasol 
for believing that it is at all closely related to either of thes 
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. 
ing apparently the erection of a special family for its recep” 
tion. 
In addition to the material of B. Pringsheimii obtained,# 
second and much less well defined species was found in com 
pany with it ina single locality at Kittery Point. In tM! 
form the resting spores are less highly differentiated, thougt 
produced in greater abundance, and resemble thick wallet, 
sporangia, slightly modified in form. There can howevet be 
little doubt of the correctness of the generic reference of the 
plant, which may be characterized as follows: 4 
Blastocladia ramosa, nov. sp.—Main axis nearly cylia 
drical, attached to the substratum by rhizoidal divisions 
its base; above copiously branched, irregularly or sub-dichot 
omously, the branchlets producing terminally and sub-t! 
minally sporangia and resting spores. Sporangia broa@’ 
oval, bluntly pointed, 30x15u. Resting conidia terminal 
bluntly rounded gradually narrower towards the truncate ba 
about 30X11. The whole plant 260 to 600p high, its mal 
axis 14 to 204 in diameter.—On submerged twigs, Kittel 
Point, Maine. Plate III, figs. 14-16. oe 
This species has been found in only one locality grow" 
with B. Pringsheimii and other forms in a small pool I 
sphagnum bog, and occurred in such small quantity that | 
was unable to observe the escape of its zoospores; since” 
i 
UM ERE 
