84 SEAWEEDS 
angia over the whole surface. He assigns it a place 
near Scytosiphon, which it resembles in habit. These 
reasons appear to be inadequate when we remember 
the slightly differentiated thallus of Adenocystis, 
for example, and the further fact that within the 
Laminariace there are various degrees of localisation 
and restriction of sori. Its paraphyses, which are 
aberrant, are nevertheless in agreement with those 
of so typical a Laminarian as Saccorhiza. On the 
whole there appears to be room within the Lami- 
Fic. 18.—a, Adenocystis Lessoniit reduced one-half; b, cryptostoma, from 
centre of sorus of sporangia highly magnified. 
nariacew for Chorda, unless Mr. Buffham’s discovery 
of plurilocular sporangia in association with it should 
prove to be well established, and not a case of an 
epiphytic Alga. In that case Chorda would have to go. 
The cryptostomata with septate paraphyses which 
occur, as mentioned above, in certain genera resemble 
in appearance, though not in mode of development, 
the conceptacles of Splachnidium. Only in Adenocystis, 
which in other respects is not unlike Splachnidium, 
