^ 
f 
MONOGRAPH OF THE LABOULBENIACE.^. 255 
E 
remote relationship to the Hypocrcacca3, it is worthy of note that the bodies most 
nearly resembling the characteristic antheridial cells found in the family are the 
"Hyphopodies mucrOnees" of tlie Meliola?; but having as yet been unable to ex- 
amine the latter in a fresh condition, I can at present merely suggest the pos^=ibility 
of a similarity of function. 
In arranging the genera under which are grouped the species included in the fol- 
lowing systematic enumeration, the primary divisions have been bnf^ed on the 
of the male sexual organs. Forms 
usly p 
ozoids that are produced end 
duced, have been separated in a group of " exogenre," comprising but two genera, 
while the remaining twenty-six genera having anthe 
genously, are placed in a second group of " endogenoB.' 
The two genera of the first-mentioned group are both primarily aquatic, and if we 
entertain the suggestion that the family has been derived from carposporic algal 
ancestors, might, from their simple antheridial branches and their aquatic habit, be 
considered as probably the more primitive of the two groups. Of this group, the 
genus Ceratomyces may be taken as the type, since it illustrates most clearly not only 
o 
formation of 
ds, but the indeterminate development of 
perithecia and their tendency towards an appendiculate condition. 
The twenty-four genera of the second group offer many difficulties, if 
o 
ige them in lineal sequence ; but 
affords a natural means for their 
g 
g 
irized in the one case by the presence of what have been previously described as 
compound," in the other of "simple" antheridia, and these again may be sub 
divided accord 
different iudivid 
A further subdivision has been employed in the following synopsis based 
determinate or ind 
o 
mient of the antheridial cells ; but this dispo- 
sition, while it expresses, in a measure, true relationships, by bringing together such 
genera as Idiomyces, Stigmatomyces, and Ilelminthophana, is not wholly satisf\ictory. 
Further than this, a definite arrangement into not too numerous sub-groups is hardly 
possible, although it is evident that genera like Moschomycos, Compsomyces, and per- 
haps Sphaleromyces, or Teratomyces and Diplomyces should go together. A more 
definite appreciation of their further relationships will no doubt become possible after 
the discovery of additional genera ; but at present it would be quite superfluous to 
attempt to represent them graphically. 
