FRESH-WATER DIATOMS FROM ICELAND 33 



*Pinnularia Legumen Ehr. Cl. Syn. II, 78. V. H.Trt., Tab. II, fig. 98 



(Nav. Leg.). 



Reykjanes (N.) Thor., in a hot spring, Ulfsbser (N.) B. P. 

 Area : Ubiquist, Grl. 



Var. longa A. Cl. f. interrupta A. Cl. Finl., 28, Tab. 1, fig. 26. 

 TorfastaAir (S.) A. F., in a hot spring. 

 Area: Eur. 



Pinnularia parallela Brun var. crassa 0st. 0st. D. D., 99, Tab. Ill, 

 fig. 64. 



StadastaSur (S.W.) H. Js. 

 Area: Eur. 



Pinnularia platycephala Ehr. Cl. Syn. II, 79. Cl. Finl., Tab. II, fig. 1. 

 A. S. Atl., Tab. CCCX, figs. 68. 



Frofiarheifii (SAY.) H. Js. 

 Area: Eur., Grl., J. M. 



Distantes Cl. 1895. Cl. Syn. II, 80. 



Pinnularia alpina W. Sm. Cl. Syn. II, 81. V. H. Trt., Tab. XXV, 

 fig. 705 (Nav. alp.). 



Sandbrekka ( E.^ H. Js., Seydisfjord (E.) B. P. 

 Area : Eur. 



Var. Hnearis var. nov., Tab. nost. Ill, fig. 49. 



Long: 64 //, lat: 14,4 /f, str. 5 in 10 n. 



Valva linear!, apicibus rotundatis. Raphe area hyalina, media 

 in parte valvse in aream rotundatam dilalata, cincta. Fissuris ter- 

 minalibus semicircularibus. Slriis radiantibus, apices versus con- 

 vergentibus. 



Ssevarendi (E.) B. P. 



Owing to the radiate-convergent striae, I consider this form should 

 rather be classed with Pinnularia alpina than with Finn. lata. It has 

 hardly anything to do with Finn, borealis. 



*Pinnularia Balfouriana Grim. Cl. Syn. II, 80, Tab. I, fig. 18. A. S. 

 Atl., Tab. CCCXIII, figs. 29 31. 



6 samples (S. 2, SAY. 1, N. 2, E.I). Hot springs; 2. 

 Area : Eur., Fz. J. 



^Pinnularia borealis Ehr. Cl. Syn. II, 80. V. H. Trt., Tab. II, fig. 77. 



195 samples (S. 32, S.W. 49, N.W. 9, N.39, E. 64, s.l. 2). Hot springs: 17. 

 Never in great numbers in the samples. 



Area: Ubiquist, Grl., J. M., B. E., Sp., Fz. J. 



Var. breuicostata Hust. Hust. Slid., 82, Tab. nost. Ill, fig. 50. 

 Long: 25 /*, lat: 7 //, str. 5 in 10 JLI. 



The Botany of Iceland. Vol. II. 3 



