OF SOUTH AUSTRALIA. 
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medulla; sporangia tetrapartite ; spermatangia superficial on the male 
plants, widely distributed ; carpogenic branches scattered, of five cells, the 
carpogonium fusing with an intermediate cell in the branch from which 
ooblastic filaments go out to auxiliary cells in separate axes, which in turn 
give rise to the scattered cystocarps. 
Dasypliloea Montagne. 
Family GLOIOSIPHONIACEAE. 
Plants soft and bushy ; structurally composed of a central filament with 
compact lateral assimilatory filaments; sporangia tetrapartite; carpogenic 
branches of three cells, carried on a supporting cell common to the 
associated auxiliary axis of seven or eight cells, the fifth being the func- 
tional auxiliary ; cystocarps attached to the bases of the assimilatory fila- 
ments, without a pericarp. 
Family ENDOCLAD1ACEAE. 
Thallus of the central filament type ; apical cell two-faced, forming two 
pericentral cells, and either tufts of small branches or a number of thin 
filaments develop, resulting finally in a pseudo-parenchymatous cortex. 
Fertile branch tufts developing from the inner cortical cells, and auxiliary 
cells and two-celled carpogonia formed ; after fertilization gonimoblast fila- 
ments develop from the auxiliary cell, passing outwards; these are so 
abundant between the inn^r cells of the- thallus that fusion may occur with 
these cells, thereby facilitating nutrition. From the gonimoblast filaments 
develop tufts of small rounded cells, each of which forms a carpospore, 
the thallus becoming somewhat swollen where the gonimoblasts develop, 
but with no special protective filaments formed. 
Family RH1ZOPHYLL1DACEAE. 
^Plants erect, bushy, dichotomously branching and tough; structurally 
with a medulla of many longitudinal filaments and an assimilative cortex 
of branches turning outwards, in some genera these structures derived from 
an apical cell; tetrapartite sporangia between the cortical cells of the 
sporangial plants, scattered or in some genera in nemathecia; sexual organs 
in nemathecia, the carposporic type much swollen ; spermatangia lateral 
on short, crowded, superficial filaments; carpogenic branches associated 
with quite similar auxiliary axes in nemathecia, the carpogonium fusing 
with an intermediate cell in the carpogenic branch, from which ooblast 
filaments go out to auxiliary cells in separate axes, which give rise to the 
crowded cystocarps. 
Chondrococcus Kiitzing. 
Family SQUAMARIACEAE. 
Plants spreading, crustaceous; structurally usually with a basal layer 
of radiating branched filaments from which an upper layer of compact 
erect filaments arises, the whole sometimes a little encrusted with lime; 
