52 ERNST ØSTRUP 



139 samples (S. 35, S.W. 33, N.W. 2, N. 32, E. 33, s. 1. 4). Hot 

 springs: 3. 



Area: Eur., Af., As., Am., Grl. 



Under Ep. turgida I include var. granulata, which can scarcely be 

 kept apart from the typical species. 



Var. capitata Fricke. A. S. Atl., Tab. CCL, fig. 7. 



Hallormstaôir (E.) B. P. 



Area: Eur. 



Differs only from the type by having capitate apices. 



Forma anomala cnfr. Øst. D. D. 169, Tab V, fig. 110. 



Varmâ (S.) B. P., Skutustaöir (N.) B. P., Lagarfljöt (E.) B. P. 



This peculiar form which I, 1. c, referring to Heiberg's Ep. globifera 

 (cnfr. Heib. consp. 103, Tab. VI, fig. 22) placed as an abnormity of E. 

 turgida. might be the sporangial form of this species. It has been found 

 in 3 samples all containing plenty of E. turgida. 



*Epithemia Zebra (Ehr.) Ktz. V. H. Trt. 296, Tab. IX, fig. 357. 

 264 samples (S. 62, S.W. 63, N.W. 6, N. 41, E. 88, s. 1. 4), Hot 

 springs: 15. 



Area: Eur., Af., As., Am. 



Var. longicornis M. Per. & Hérib. Hérib. Auv. 128, Tab. Ill, fig. 14. 

 Laxå (S.) A. F., Vallanes ^E.) H. Js., Hallormstaôir (E.) B. P. 

 Area: Eur. 



Var. longissima M. Per. & Hérib. Hérib. 1. c. 128, Tab. c, fig. 13. 

 8 samples (S.W. 5, E. 3). Hot spring: 1. 

 Area: Eur. 



Var. proboscidea Grun. V. H. Trt. 297, Tab. IX, fig. 358. 

 23 samples (S. 7, S.W. 2, N. 3, E. 11). Hot springs: 4. 

 Area: Eur. 



Brachyraphideæ 

 Eunotia (Ehr.) 1837. Char, emend. H. Van Heurch. V. H. Trt. 298. 



*Eunotia Arcus Ehr. V. H. Trt. 299, Tab. IX, fig. 362. 

 13 samples (S. 1, S.W. 4, N. 4, E. 4). 

 Area: Eur., Af., As., Am., Grl., Spb. 



Var. bidens Grun. V. H. Trt. 1. c, Tab. c, fig. 365. 



4 samples (S. 1, S.W. 2, E. 1). 

 Area: Eur., Grl. 



Var. minor Grun. V. H. Trt. 1. c, Tab. c, fig. 363. 



5 samples (S.W. 2, E. 3). 

 Area: Eur., Grl. 



Var. tenella Grun. Schönf. Germ. 116. V. H. Syn., Tab. XXXIV, 

 figs. 5—6. 



Thingvellir (S.W.) E. W. & Ho, Reykjavik (S.W.) H. Js. 



