RHODOPHYCE, OR FLORIDEX 229 
that in Lomentaria clavellosa the fused carpogonial 
branch in uniting with the auxiliary cell first 
segments off a small cell which fuses with the 
auxiliary cell, but in Z. articwlata union takes place 
directly. Again, while in Chylocladia only single 
gonimoblast cells are given off by the central cell 
Fic. 73.—Champia parvula. a, b, e, d, successive stages in germination of 
earpospore ; e, optical section of further stage in segmentation of spore; J, 
longitudinal section of apex of young plant highly magnified. (After Davis ) 
for the formation. of carpospores, in Champia and 
Lomentaria multicellular branched gonimoblast fila- 
ments are given off, and the terminal cells of these 
give rise to carpospores. 
Mr. B. M. Davis has made a minute study of the 
development of the frond of Champia parvula from 
