2()2 JOIIS. H<»3i: l'KIKMSKN 



roll is (liMwii roiind. Prohably Monu'l. howevcr, has had at liis dis- 

 posal an oriKinal spccimcn whcreby lu' has nolcd thai I*, rupestris 

 aotually has elonj^alcd ci'lls and Ihcicloie must bo rcreni'd lo llu- j,'cmis 

 (ilocotlicce. 



I.aj^eilu'im (1883 p. 45 daii-d not siibscribc to Hornets assuinption 

 and rcluscd to identily (llovocapsa Icpiilarionuii A. Hr. J^ab. Al},', no. 221) 

 witli I\ilint'lhi nipcstris Lynj^byc. 



In llcrb. I.yn-^byc \ve liavf a spccimcn with tlic lolluwing inscrip- 

 lion in Lyn^byes hånd: "'Palniella nipeslris d. 4. July 1816 in nipibiis 

 udis earuindcnuiue lissuris ad Næss Norvegiæ, sat frequcns. C.inn delinca- 

 tione." If wc coniparc this with llie text in "ny(h-<)])IiytoIogia ", wc shall 

 scc that it is evidcntly just this spccimcn on whicli tlic dcscrii)tion was 

 based, and thc "dclincatio" in tpicstion not to bc foiind in thc herbarium 

 is certainly the fij'ure shown on tab. 69 I) in the book. 



In thc abovc-mcntioncd sample a bluc-L(rccn alj^a with clonj^atcd 

 cclls and j^clatinous shcaths occurs. Thc latter are, howevcr, not idcntical 

 in all thc cells; sonictimcs they are almost non-strati(icd and somewhat 

 conflucnt, at times very distinct and with ])ronounced stratification. In 

 thc latter case the shcaths may be almost hyalinc. but are most Ire- 

 (jucntly brown and granulatcd. In thc first case they are most fre(|uently 

 somewhat ycllowish. Betwcen the various forms, howevcr, almost con- 

 tinuous transitions exist, and I therefore feel convinced that they all 

 bclon}^ to thc same species. It is just these various forms Lyngbye has 

 ligured in tab. (U) I). Fig. 2 chiclly rci)rcsents a mass of cclls with con- 

 lluent shcaths, whercas ligs. 3 and 4 show cell-lamilics with distinct and 

 brownish shcaths. 



Hesides I have examined no. 221 in Rab. Alg. which is the original 

 spccimcn of Glnvocdpsa Icpidariornni \. Br. Ilcrc wc have a form with 

 clongated cells. distinct, stralilieti and entirely hyaline shcaths idcntical 

 with those which also were found, although in lesser numbers, in thc 

 s|)ccimcn in Hcrb. Lyngbye. 



No. 3*)*> in Wittr. et Nordsl. is, in a way. a transition betwcen the 

 two above-nicnlioned exsiccala in that wc liere have — bcsides ccU- 

 families with hyaline, stratilicd sheath — sonic with stratilied brown- 

 ish shcaths. 



Furthennore I have tested tiic reaction of chlor-zinc-iodine on the 

 thrcc aforc-mentioned exsiccala. In all threc cases I arrived al the con- 

 clusion that the absolutc hyaline shcaths slowly were stained faintly 

 bluish, whcreas the brown shcaths gave a rajiid and deep blue reaction. 



Therefore it is undoubtedly the same species we have to do with 

 in lliesc thrcc exsiccala, and consecpiently this sjiecics should be namcd 

 (ilofolhrcr rii/xslris Lyngb., Hornet, wliilst dlocucupsa Upidarionuu must 

 be set up as a synonym. Ncither is there any reason to retain the 

 latter form as a variety as there is no dilfcrence in Ihc dinicnsions of 

 thr cclls or families in the Ihree exsiccala in question. 



In this species cclls with brown shcaths have bcen considered as 

 spores Lagcrheim 1. c. Ilansgirg I'rodromus j). 1 3() . Il is probable that 

 the brown .shcaths may .serve as |)rotcction for the cells, but it seems 

 d<)ul)tful to me whclhcr such proiccted cclls can bc regardcd as spores. 

 That depcnds upon whclhcr cell-division can be cnccted in this form 



