56 
THE SEAWEEDS 
Identified by 0. C. Schmidt with C. mucronatum J. Ag. and retaining 
its name by reasons of priority of publication. Assuming this identifi- 
cation to be correct, it is distributed in all the oceans, reaching even Tierra 
del Fuego and Magellan Straits. 
C odium decorticatum (Woodward) Howe. 
Differs from the previous species in that the thallus is almost entirely 
flattened, except at the very base, and, in the cuneate (wedge-shaped) 
sections below the main forkings, may attain a width of from 1 to 5 cm. 
or even more. It may reach a height of 30 cm. or more. 
Fig. 38 . — Codium decartioatum. 
Utricles rounded or flattened at the tips, the membrane thin, not much 
thickened over the tips, 4 to 6 times as long as broad, 700 ^ to 1,700 /x long 
by 120 /x to 400 /x broad. 
Gametangia ovate or spindle-shaped, one-fourth to one-third as long as 
the utricle, 260 ^ to 450 /x long by 90 /x to 150 /x broad. 
Identified by O. C. Schmidt with C. elongatum Ag. Schmidt assigns to 
it an almost world-wide distribution. Though not yet recorded from South 
Australia, it will almost certainly be found there. I have collected it, or a 
very closely allied form from such distant localities as Lord Howe Island, 
Botany Bay, and the north coast of Tasmania. 
