300 



.lOIIS. UOJil-: l'liTKHSKN 



«^- 



O 

 Fig. 12. Anabirna vernicosa n. sp. 



a. Tricliome witli a spore (X 600). 



b. — — heterocyst ( X 1 200\ 



c. Two spores (X 12001 



apicali rDtundala; hetcrocystis cvlindricis. apicibus roliindalis, cclliilis 



vej^ctalivis aH|iiilalis, ;^--4 n latis, 5—8 ii loiif^is; sjioris cvliiiilricis soli- 



tariis vel ji;tMiiinis, apit'ibus roUiiKlato-truncatis, G — 7 // latis, 12-15 n 



,_ l()n<iis; epi.s|)i)rio sæpissime vcrrucoso, lus- 



*^*^^^*^^J N. Iccl. S(|iieozt'(l out oC Sphiuimim 

 c al Ihe niarj^in ol' Mvvaln ncar (loilcyjar- 

 strond ; rcact. acid. ''^/t 15)14. 



Tilis spcc-ics is spocially cliaraclcrizcd 

 by Ihe diaiiielfr ol' liic iieterocysts cone- 

 sponding cxactly to that ol' tlie vegetative 

 cells in that il looks as if thc whole tri- 

 c'hoiiie is liriuly encased by a close, cy- 

 liiidrical shcalh \vhich, howcvcr, is not 

 always distiiu-lly visible. The spores, on 

 Ihe other hånd, are alniost twice as Ihick 

 as Ihe trichome. They have olten a niinu- 



lely papillose menibrane; but I have seen theni ijuite snioolh in a few 



cases. According lo my opinion il is most closely related to A. Felisii 



(Men.) Horn. et Flah. 



Finally il should be reniarked that Ihe sample, in whieh it occur- 



red, was preserved in formalin. 



Anabæna oscillarioides Bory. 



Bornet et Flaliault, Revision IV j). 233. Lemmermann 1910 p. 189. 



E. Tcel. Dripping rocks. FlJcUsdalur ^^/n 1914. "Dy" near Kgils- 

 statMr, temj). 4" -^ 6 1914. Spring near Hallornista^ir, temj). 8 '^ -'', e 1914. 

 Stream in the Hallormstai^ir lorest, lemp. 20 ^ ^^,6 1914. Lake ibid., 

 28/6 1914. St6(^ 'Vs 1894 (H. .1.)! - N. Icel. Washed ashore on an 

 island in MVvaln oli" Skulusla(Mr '^ 7 1914. — X. W. Icel Pool near 

 Isatjort^ur. lemp. 12" ^\ 7 1914. — S. Icel. Gljufurholtså near Kotsfrond, 

 lemp. 15^ ^Vs 1914. Varma near Reykjafos, lemp. 18*^ '^ s 1914. l'ool 

 al Pingvellir, lemp. 4 ^ ^^8 1914. 



Var. Iciiiiis Lemm. 1910 p. 189. 



E. Icel. Rocky wall over which water was liickliiig. I'"IJ(')lsdalur '^" « 

 1914. Ekkjufell ''l^ 1914. Lake in Ihe HallormshuMr Ibresl, temp. 20 " 

 2»/6 1914. Branch ol Lagarlljot ^Sye 1914. _ N. Jcel. Spring near llall- 

 dorstac'^ir at Laxa, lemp. 9 " -^7 1911. 



Area: All conlinents, Antarctic, Lap|)land, (, Borge; var. stcnospora. 



As far as ils distribution is concerned A. oscilhirioidrs must be de- 

 signated an Ubiquist. Ilowevcr. il is slrange thai it has been recorded 

 but once from a subarctic region. In Iceland I have found il on highly 

 varied habitals in running as well as in slagnanl waler, in water per- 

 nianently rather warm (Varma 18" C.) as well as in permanenlly cold 

 water "DV). Furlhcr il occurred as a seml-aerobiolic form on drip- 

 I)ing rocks. 



In the literature smaller pools wilh stagnaiit walcr aic lecordcd as ifs 

 usual liabital; however. it is also recorded from rivers und theniue even. 

 As lo more remarkable occurrences il should be mentioned thai it was 



