But if the study of the Amphiroae showed clearly that only one new species was to bc 

 looked for amongst my material, at least this study led me to a careful investigation of the 

 whole group, which had to be worked out afresh. How and why this was done will be 

 explained in that part of the paper that treats of the Corallineae verae. 



I should like also to express my thanks to Prof. Rothpletz of München and to Prof. 

 Martin of Leiden, who both gave a large collection of fossil slides containing Corallindceae 

 to Mr. Foslie and me for investigation. In the collection of Prof. Martin I detected a fossil 

 Amphiroa from the Tertiary of Celebes and a fossil Jania from a more recent stratum at 

 Ambon, and in a slide from the Tertiary of New-Guinea that I owed to the kindness of Prof. 

 Wichmann of Utrecht, I found another species of Amphiroa. 



To all those, who gave me good advice and helped me on, though I don't name them 

 here, I feel heartily indebted and especially so to my kind friends Mr. and Mrs. Gepi- who 

 looked over this paper and improved my English. 



SIBOGA-EXPEDITIE LXI. 



