414 MR. G. 8. WEST ON 
ANCESTRAL FILAMENTOUS CONJUGATES. 
{ 
GENICULARIA | 
GoNATOZYGON : 
' | 
' i ^ 
' ' H 
' 
Cyunorocystis 
MesoTÁENIUM | 
A PENIUM 
SPIROTAENIA 
GLosterium R 
YA 
TeTMEMORUS 0 
EUASTRUM 
PLeunoTÉENIUM 
Docioium 
CosMaRIUM 
— ICHTHYOCEACUS 
CosMocLADIUM MICRASTERIAS 
SPONDYLOSIUM N 
WA TRIPLOGERAS 
PuvMaToDOCIS t 
XANTHIDIUM 
STAURASTRUM 
N Y 
ARTHRODESMUS 
DicHoTOMUM 
ÜNYCHONEMA 
SPHAEROZOSMA 
`  STREPTONEMA 
' 
Desmioium 
(DiovwoeniuM ) 
Gymnozvca 
" 
HvALOTHECA 
Phylogeny of the Genera of Desmids. 
