222 
THE SEAWEEDS 
Nitophyllum pristoideum Harvey. 
Frond 10 cm. to 20 cm. high and 8 cm. to 15 cm. in lateral spread, exces- 
sively decompound, the greater and lesser branches of nearly uniform 
breadth about 4 mm. in diameter. Cystocarps most frequent near the ends 
of the segments. Sori crowded in the ultimate divisions of the frond. 
Colour a dull dark-red, browner on drying. Substance rather rigidly mem- 
branous. 
South Australia (Encounter Bay, Eastern Bays) and Victoria. 
Fig. 86 . — Nitophyllum pristoideum : a, plant; h, apex 
with cystocarps; c, section of a cystocarp; 
d, apex with sori of tetraspores; e, tetra- 
spore. (After Harvey.) 
Subgenus Cryptoneura. 
1. Fronds elongate, to 15 cm. long, narrow, 2 mm. to 
4.5 mm. wide, growing up amongst other algae 
and clinging to them here and there by a lobe 
transformed into a cirrhus, other lobes often 
