THE AERIAL ALGÆ OF ICELAND 331 



15. On a wall, Egilstaåir ^^/e. 



(Prasiola crispa, Caloneis Siliciila v. genuina, Gomphonema gracile v. 

 dichotomum, Hantzschia aniphioxys, Pinnularia borealis, and numerous 

 fragments of larger diatoms which evidently have not been living in 

 this locality). 



22. Twig of Betula odorata in the wood at Egilstaåir "Ve. 

 (No algæ). 



23. Cortex of Betula, the wood at Egilsta6ir --^/e. 

 (No algæ). 



24. Rock with trickling water; ground sloping towards Eyvindara 

 in the shadow^ of Salix phylicifolia -^/e. 



(.Desmidiaceae. Nostoc sp., Tolypothrix sp., Diatomella Balfoiiriana, 

 Diploneis ovalis v. oblongella, Eunotia gracilis, E. prærupta f. curta, 

 Melosira crenulata, Meridion circulare, Navicula contenta, N. perpiisilla, 

 Nitzschia amphibia, Pinnularia gracillima, P. lata v. Rabenhorstii, Rho- 

 palodia gibba, R. gibberula). 



25. Moss in the fissure of a rock at Eyvindarå ^^/e. 



(Achnanthes microcephala, Ceratoneis Arcus, Denticula frigida, Dia- 

 tomella Balfoiiriana, Diploneis minuta, D. ovalis v. oblongella, Meridion 

 circulare, Navicula bryophila, N. Rotæana, Nitzschia amphibia, N. com- 

 munis, N. debilis, Pinnularia gracillima, P. parva v. minuta, P. viridis v. 

 commutata, Rhopalodia gibberula, R. ventricosa, Tabellaria fenestrata, 

 T. flocculosa). 



28. On the bridle-path across the myri near Vallanes "Ve. 

 (Epithemia Argus, Eunotia prærupta f. curta, Nilzschia amphibia, 



N. communis, N. c. v. abbreviata, N. Palea v. minuta, Pinnularia borealis, 

 Rhopalodia gibberula, R. ventricosa). 



29. Moss from the top of a knoll; myri near Vallanes ^Ve. 

 (Stigonema minutum, (iloeothece rupestris, Nostoc sp.). 



40. On sods in the lower part of the wall of old Vallanes ^^/e. 

 (Prasiola crispa, Diatomella Balfouriana, Diploneis ovalis, Eunotia 



prærupta, Hantzschia amphioxys v. xerophila, Navicula mutica f. Cohnii, 

 N. m. f. minima, N. pusilla, Pinnularia borealis, P. intermedia, P. viridis 

 v. commutata, Rhopalodia gibberula). 



41. Myri; in a place where green turf had been removed; Vallanes ^^/e. 



(Vaucheria sp., Caloneis angustivalva, Epithemia Zebra, Eunotia præ- 

 rupta f. curta, Gomphonema angustatum v. producta, Hantzscliia am- 

 phioxys V. genuina, Navicula cincta v. Heufleri, Nitzschia amphibia, Pin- 

 nularia appendiculata v. irrorata, P. borealis, P. intermedia, P. parva 

 V. minuta). 



55. Rock-cave near stream; Mjoanes. Water dripping down con- 

 tinually -'^/e. 



(Hormidium flaccidum, Ulothrix zonata, Tribonema bombycinum, 

 Diatoms, chielly Meridion circulare). 



