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medium. Io thè Florideae thè non-motile spermatium only reaches 
thè carpogonium contents after thè walls of contact between thè two 
cells bave been broken through ; thè presence of thè trichogyne thus 
becomes secondary and is apparenti/ connected with thè more or less 
imbedded position of thè carpogonium. No doubt thè changes which 
occur in thè fertilised carpogonium, in thè development of thè cys- 
tocarp, and thè ultimate formation of thè carpospores show consid- 
erable differences in thè two groups. These differences are not, 
however, such as to prevent one from regarding thè carpospores of 
thè two as horaologous bodies. They bave to do, it seems to me, with 
thè nourishment, protection and facility of distribution of thè car- 
pospores rather than with questions of a morphologìcal naturo and 
are no basis on which to found thè exclusion of thè Bangiacece from 
thè Floridece. 
Thus it will be seen that I consider thè evidence which Schmitz 
adduces in support of his contention that thè Bangiaceae are not 
Florideae is, to say thè least, insufficient. I agree with Berthold who 
has monographed thè group that they are true Florideae, though a 
completely isolated group in thè Florideae. They are a shoot, which 
branching off early from thè inaia Floridean stera, has developed in 
its own special way, without undergoing further branching. The Ban- 
giaceae apparenti/ carne off from this main stem before some of thè 
features one usuali/ associates with thè Florideae had become as 
pronounced and fixed as one finds them in thè Eu- Florideae of to-day. 
I think thè relationship between thè two groups would be indi- 
cated by including both in thè one group thè Floridece or Rìiodo- 
phycece, consisting of thè lower group thè Bangiacece and thè higher 
group, containing thè rest of thè Florideae, thè Eu-Floridece. 
