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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 

 Laminariacce 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- 



FIG. 18. a, Adenocystis Lessonii reduced one-half; b, cryptostoma, from 

 centre of sorus of sporangia highly magnified. 



iiariacece 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 Chwda 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, 



