7Q THE BOTANICAL MAGAZINE. &<*■ xxxii. so. m. 



ments on the margins or on the terminal segments of frond. In 

 some specimens, they are found on small semicircular extensions 

 from the frond margins and not seldom simply marginal and 

 elongated in some upper segments. The external appearance of 

 frond varies very much. This is due to the number and size 

 oft he free segments and .especially in their manner of ramifi- 

 cation. 



After close examinations of the authentic specimens of 

 Nitophyllum which point to our plant I have determined to 

 identify ours, though with some doubts, with N. monanthos J. 

 Ag. The type specimen of the species at Lund are but few in 

 number and at all events can show only a part of variation of 

 the forms. 



N. minus Hary. should be undoubtedly combined with the 

 present. Sonder's cotype in the Agardhian Herbarium can 

 hardly be separated from the type of this species. The plant 

 illustrated by Kutzing in Tab. Phyc. XVI, Taf. 26 under N. 

 minor Sond. shows a form with the free terminal segments 

 amply developed. 



A specimen of the present plant collected by Mr. Tanaka at 

 Hakodate, is found in the herbarium ' of the Trinity College, 

 Dublin, determined by Grunow as N. deformatum Sdhr var 

 japonicum Grun. An exactly similar specimen is found in the 

 herbarium of the Botanical Museum of Berlin determined also 

 by Grunow as A7. acrospermum J. Ag. var. japonicum Grun. 

 As far as the Original specimen of N. monanthos J. Ag. and N. 

 acrospermum J. Ag. show, the two species appear to have been 

 well defined. But judging from my specimens both appear to 

 be linked b} r numerous intermediate forms. N. tongatensis Grun. 

 might also very likely be regarded as a ^variation of either. 

 But at present I can not be bold enough as to combine them 

 into one species. The flabellate forms with broader linear seg- 

 ments composed of three layers of cells shall be separated from 

 N. monanthos and be placed under N. acrospermum J. Ag. 



Still one more specimen of our plant, collected at Hiogo, 

 Japan is found in the Botanical Museum of Upsala, determined 

 by Kjellman as N. marginatum. It has, however, nothing to 



