A NEW ORDER OF ALGE. 187 
*» 
: to t 0 
terminal spore-forming cell. Quite different is the germination of the 
ceauloi 
8. 
n the cs uction of branches the first thing seen is a small 
rounded process directed vt rds and outwards, which resembles the 
Bulbochete-branch in sometimes breaking through the outer part of the 
membrane. is process elongates, and, after a time, is seen to be 
vi yp 
somewhat obliquely with regard to the longitudinal axis of the young 
branch-cell, which itself divides when it has attained twice the length 
e parent, It is usually only after completion of ramification 
case is shown by the fact that a cell can be seen to have chan m 
branch-forming to spore-forming, the rudiment of the branch remain- 
ing as sort of beak at the side of the spore 
e discussion of affinities, the author comes to the obvious 
seiitiacose that Pithophoracee are closely connected with Cladophorea, 
e main points of difference consisting in the nature of the rhizoid 
part and in the absence of zoospores, the place of which is appa- 
that an additional consideration ia ober of the view that Pithopho- 
only remains to add that rgans of sexual reproduction were met 
with, and to allude to elassifeaton, for the purposes of which the 
genus is divided into two se The first or isosporous contains 5 
Tran vada , In iia 
_ We venture to suggest that Blodgettia sous Harv., 
ly figured an gad, concen feces oy en specimens, and 
Yr - 
recently announced by Dr. E. P. Wright from Bermuda (Quart. 
We 
Jour. Micros. Se., 1876, p. 342) may possibly be a congener. 
