No. 5] REVISED SYSTEM. SURVEY OF THE MELOBESIEAE. 5 



quotes 1. c. p. 407: „Hierdurch kam ich zu dem Entschluss, dass 

 ein sicheres Mittel zur Systematik nu r in den Tetrasporangien liege. 

 — ■ — Freilich wollte ich die von mir vorgeschlagene mathematische 

 Zellordnung beibehalten, dann musste nochmals ein neues Genus 

 geschaffen werden, und zwar konnten nunmehr diejenigen, die ich 

 S. 43 fur Melobesia hielt, auch nur durch „Conceptakel" resp. 

 „Sorus" getrennt werden. — — Merkwiirdiger Weise blieben fast 

 alle von mir friiher zu Lithophyllum gezåhlten Melobesiae dabei, 

 nur Lithophyllum lichenoides riickt zu Lithothamnion iiber''. Cp. 

 however above and the list of species in both papers. Moreover 

 the species of the genera Phymatolitlion and Clathromorphum of 

 my Syst. Surv. are included in Lithothamnion, and Goniolithon 

 and in part Melobesia 1 ) as well included in Lithophyllum. Thus 

 the said genera (Lithothamnion and Lithophyllum) were only li- 

 mited through „Conceptakel" resp. „Sorus" and the vegetative 

 organs, and the limit between these genera and Melobesia (resp. 

 Epilithon) were still confined only to the thallus. 



In my notes 2 ) on this I quoted with regard to the sporangia 

 as the foundation of the systematical classification : „Insofern sind 

 wir einig; nur will ich hinzufugen, dass dies nicht nur von den Tetra- 

 sporangien gilt, sondern uberhaupt von den Reproduktionsorganen". 



I state this in order to show my earlier sentiment on the 

 systematism of these Algae, as it has been a subject of misrepre- 

 sentations on the part of Mr. Heydrich, the fact being that I 

 only have pronounced against a systematism based on the deve- 

 lopment of the vegetative organs. 



Not wishing to wait for a third system again within a short 

 time, to which my notes perhaps might give rise, I published shortly 

 after my last notes a provisional Syst. Surv. 3 ), although this sy- 



*) The consequence of subsuming for instance Melobesia Corallinae under 

 Lithophyllum (as done by Mr. Heydrich) would be that these two ge- 

 nera must be merged into one. Cp. below and So Ims, Corall. Monogr. 

 where all the reproductive organs in this species are described and pictured. 



2 ) M. F o slie, Weiteres uber Melobesieae. Ber. der Deutschen Bot. Ges. 1897. 

 Pag. 521. — In this paper are unfortunately some deceptive misprints. 



3 ) M. Foslie, Systematical Survey of the Lithothamnia. Det kgl. norske 

 Videnskabers Selskabs Skrifter. 1898. No. 2. Trondhjem 1898. 



