2 ART. 11— K. YENDO: 



the calcareous alga?, and left a valuable paper. Solms 1} treated 

 somewhat the same subject, and wrote a few lines about the formation 

 of the genicula in the Coralline? ; and pointed out the difference 

 between Ampliiroa and Corallina in the structure of genicula. 

 Heydrich 2) noticed the critical points of the primary incrustation of 

 Corallina and Litliotliamnion. He took Corallina officinalis, L. as the 

 representative of the Corallinœ and mentioned the genicular formation 

 as an important diverging point of the two subfamilies. 



The writer previously noticed several interesting facts about the 

 genicula of the Corallina:, while he was examining material from 

 Japan and Canada. Some of the views arrived at a different conclu- 

 sion from those of former investigators. They will be pointed out 

 under the proper chapters. 



The material worked over belongs mostly to the Japanese and 

 the Canadian algœ. They were preserved in alcohol directly after 

 they had been collected or after decalcifying the fresh plants in 

 Perény's fluid. The specimens which were kindly sent to the writer 

 by Dr. M. Foslie, Madame A. Weber van Bosse, Mr. F. S. Collins, 

 Major Theo. Beinhold were a great help to him in comparing 

 results. The writer must not miss the chance to express his deepest 

 thanks to these phycologists. Thanks are also due to Prof. J. Matsu- 

 mura, Prof. M. MlYOSHi and others who have helped the writer in 

 various ways. 



The writer regrets to say that the study on Ampliiroa stelligera 

 and Ampliiroa aspergillum, which play an important and interesting 

 part in the present work, he has been obliged to undertake on dried 

 material, lie could not help omitting several important observations 

 on these species, as, with dried fronds, he was unable to pursue the 



1) Graf v. Solms- Lau bach. Corallina p. 28. 



2) Lithothamrnon von Helgoland, p. 79. 



