Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
45- 
46. 
47- 
Syf- 
58. 
59. 
60. 
61. 
62. 
63. 
64. 
65. 
66. 
67. 
68. 
146 
Colaconema reticulata (?) within the cell wall of Cladophora 
Spi; <<. SOO. 
Cells of Uvospora bangioides in process of gamete-formation. 
xX 240. 
Cells of Uvospora isogona in process of zoospore-formation. 
xX 400. 
Pre, Xvi 
Unilocular sporangium of Codiolum gregarium. XX 400. 
Surface cells of Enteromorpha micrococca. X 120. 
Section through tubular frond of Entervomorpha micrococca, 
shewing very thick mucilaginous inner wall of the tube. 
xX £20, 
Endoderma Flustvae var. Phillipsii with zoosporangia, in 
the body of Alcyonidium hirsutum. xX 360. 
Enteromorpha micrococca.  X Io. 
Single plant of Codiolum gregarium in a vegetative condition, 
with conspicuous pyrenoids. X 240. 
Endoderma Flustrae with zoosporangia, within the body of 
Flustva.  X 360. 
Lateral view of a filament of Percursaria percursa, shewing 
parietal chromatophores. xX 460. 
Surface view of a filament of Percursaria percursa with con- 
spicuous pyrenoids. X 460. 
PLATE Xvi 
Detail of the branching of Callithamnion scopulovrum. 20. 
Choreocolax Polysiphoniae on Polysiphonia fastigiata. X 120. 
Plants of Prasiola stipitata. Nat. size. 
Part of a plant of Callithamnion Dudresnayi with tetraspores. 
xX 40. 
Surface of Aglaozonia veptams, scraped from stones. X 20. 
PLATE Savill: 
Part of a frond shewing the habit and branching of 
Callithamnion scopulovrum. X 2. 
Young plant of Spondylothamnion multifidum. X 2. 
Callithammon polyspermum. X 2. 
Callithamnion Dudresnayi. X 2. 
Part of a frond of Antithamnion cruciatum. xX 50. 
Part of a Callithamnion whose habit is intergrade between 
C. Hookeri and C. polyspermum. X 2. 
Part of a plant of Callithamnion arbuscula. xX 2. 
