154 
THE SEAWEEDS 
Stenogramme leptopliyllum J. Agardh. 
Described from Port Phillip Heads; chiefly distinguished by the narrow 
linear lobes. 
South Australia (Encounter Bay, St. Vincent Gulf) and Victoria. 
Subfamily Mychodeae Schmitz. 
MYCHODEA Harvey. 
Frond filiform, cartilaginous, alternately decompound, dendroid, com- 
posed of three strata, the medullary of longitudinal and excurrent, inter- 
woven and anastomosing filaments; the intermediate of large, rounded, 
empty cells, smaller outward ; the cortical of minute, coloured, vertically 
seriated cellules. Cystocarps external, lateral or terminal, containing 
within a thick-walled pericarp a compound nucleus, consisting of many con- 
fluent nucleoli or masses of rounded angular spores. Zonate tetrasporangia 
dispersed in the branches and ramuli. 
Fig. 26 . — Mychodea terminalis : a, cystocarp-bearing 
plant; b, apex of a fertile branch; c, trans- 
verse section through a cystocarp; d, 
transverse section of frond with tetraspores 
imbedded in the cortical layer; e, tetra- 
spores. (After Harvey.) 
