FRESH-WATER DIATOMS FROM ICELAND 



85 



Number 

 of hot 

 springs 



25 stauropt. interr. 2 



26 stomatophora . 2 



27 streptoraphe . . 3 



28 ^viridis gen. ... 10 



29 — commut. . 6 



30 — rupestris . 3 



Total. 



91 



Bhoicosphenia (1 

 1 curvata 9 



Total. 



9 



Rhopalodia (7) 



1 *gibba 11 



2 gibberula 13 



3 — rupestris 6 



4 parallela 5 



5 ventrieosa .... 9 



Total 



44 



Stau roneis (4) 



1 anceps 1 



2 *Pboenicenteron 1 



Total ... 2 



Number 

 of hot 

 springs 



Suri relia 13 



1 ovalis minuta . 2 



2 — ovata . . 5 



Total... 7 



Synedra (17) 



1 délicat, mesol.. 1 



2 capitata 1 



3 pulchella 1 



4 rostrata 1 



5 rump, fragil. . . 3 



6 Ulna typica ... 11 



7 — danica.. . 7 



Total ... 25 



Tabellaria (2) 



1 fenestrata 2 



2 ilocculosa .... 10 



Total . 



12 



Of the forms included in above list are those found previously 

 in hot springs in Iceland (see "La flore algologique d'eau douce de 

 L'Islande par M. Emile Belloc. Paris 1894" p. 9 — 12) marked * (in 

 all 23). The ligures in brackets opposite the names of the genera, 

 give the number of species and variants of the respective genus 

 found in the material dealt with. 



In most of the samples from hot springs, I have found Diatoms 

 with endochrome. 



