12. 
13. 
14. 
15. 
16. 
a7 
125 
Basal plate in places two cells thick, giving off assimilatory 
filaments, mucilage hairs and sporangia ; 
by rhizoids penetrating into the tissues of a host plant 
Ulonema 
Jer oy 
plant attached 
Basal plate in places two cells thick, giving off short filaments 
with terminal ea oe or ak filaments with lateral 
sporangia 
Hecatonema 
d seis: 
Basal plate two a hee giving off upright filaments and 
sporangia in separate groups, surrounded by a sterile area. 
Chilionema 
Thallus thread-like, cylindrical, solid or hollow ee aes 
when mature, even before sporangia are formed 
Thallus thread-like, cylindrical, solid, monosiphonous Fe 
young stages, becoming polysiphonous first at nodes where 
sporangia form 
Small epiphytes about a half inch long 
Larger algae sparingly branched 
Cylindrical parenchymatous, unbranched filaments, 
Phloeospova ...p. 
Stictyosiphon ...p. 
surface 
2 
cells transformed into scattered unilocular or plurilocular 
sporangia, without much distortion of the smooth outline 
of the filament 
Club-shaped filaments thickly os with :— 
(a) transparent hairs, and (or) 
Litosiphon 
oi)! 
(6) short conical branches often transformed into stumpy 
plurilocular sporangia and (or) 
(c) distended unilocular sporangia ... 
Myriotrichia 
an 0 
Branches coming off all round the stem or in definite whorls, 
giving the plant the appearance of a bottle-brush 
Cladostephus 
Branches more or less pinnately arranged, not whorled... 
oan) Oe 
Thallus irregularly pinnate, super-cortication of rhizoidal 
filaments at extreme base of main axis, sporangia singly as 
lateral appendages and not in the axils of branches 
Sphacelaria 
(See: note 6) p- 
III.) 
aesipe 
Rhizoidal filaments forming an investment to most of the 
branches, sporangia in the axils or on special reproductive 
ramuli 
Vegetative axes bi-pinnately branched, pinnules arising in 
pairs from each, or every alternate cell of the pinnae; 
sporangia borne on short compound branches originating 
from cortical cells of main axis near the apex Chaetopieris 
cee: 
Vegetative axes pinnately branched (bi- or tri-pinnate), all 
branches arising by segmentation of the apical cell ; 
singly in the axils of branches 
Halopteris 
sporangia 
peel oy 
68 
69 
69 
13 
of 
14 
57 
of 
64 
67 
16 
66 
By 
67 
