OF SOUTH AUSTRALIA. 
379 
PRIONITIS J. Agardh. 
Frond compressed, linear, dichotomous or subpinnate sometimes glan- 
dulose or proliferous from the disc or margin; cortex consisting of three 
layers the inner one formed of very dense filiform cells, the middle one 
of rotund cells, the outer one of smaller vertically radiating cells. Cysto- 
carps immersed in the frond in depressions in the cortex, with filaments 
issuing from the cavities of the cystocarps, nucleus simple. Tetrasporangia 
carried on the marginal phyllodia or glands, immersed, sparse, oblong, 
cruciate. 
Prionitis microcarpa (Ag..) J. Agardh. 
Frond 6 cm. to 7 cm. long, terete below, compressed above, thick, narrow, 
linear, irregularly dichotomous, flabellate, fastigiate; segments patent, 
margin bare, apices regular and obtuse. Cystocarps in the upper segments. 
Substance scarcely cartilaginous, flexible. Adheres to paper. Colour 
purplish. 
South Australia (Encounter Bay). 
POLYOPES J. Agardh. 
Frond compressed, almost terete, dichotomous, fastigiate, consisting of 
two layers, the inner one having filaments branched and anastomosing, the 
outer one having filaments vertical, moniliform, and solidly united with 
mucous. Cystocarps grouped in certain parts, often in many rows in 
depressions in the cortex, with filaments issuing from the cavities, nucleus 
simple. Tetrasporangia subnemathecious, developed densely among the 
sparse cortical filaments, oblong, cruciate. 
Poly opes constrictus (Turn.) J. Agardh. 
Frond 8 cm. to 15 cm. long, expanded from the attachment, compressed, 
linear, repeatedly dichotomous, flabellate, fastigiate, here and there con- 
stricted, slightly irregular; upper segments constricted, almost separate, 
carrying immersed cystocarps. Colour purplish. Substance firm, fleshy. 
The nemathecia of the tetraspores cause spotted lines, surrounded by a 
sterile margin, rotund at the apices. 
South Australia (Encounter Bay), South Africa. 
CODIOPHYLLUM Gray. 
Frond more or less flattened, branched, lower ramuli foliaceous, elongate, 
upper ramuli subulate at the apices or incised-reniform and regular. 
Lower parts of the foliaceous ramuli costate, with finer costae reticulated. 
Cystocarps and tetraspores developed on the folia. 
Codiophylhm marchesettioides (J. Ag.) Schmitz. 
Frond up to 20 cm. long-, erect, ramuli above the base thick, very soon 
becoming spongiose and terete, compressed above, unevenly .contracted and 
dilated ; parts of the different ramuli grow close together and unite forming 
a very dense network of filiform ramelli, the interstices of the network 
very small, the translucent spaces not visible to the eye. Fertile phyllodia 
developed sparsely on the sides of the frond, singly or in clusters. ' 
West Australia (King George Sound). 
