18 ERNST 0STRUP 



Cymbella incerta Grim. var. nnincnlacea Grim. Cl. Syn. I, 170. 

 Cl. Grl. & Arg., Tab. XVI, fig. 11. 



7 samples S.W. 5, E. 2 . Hot spring: 1 

 Area : Eur., Grl. 



Cymbella islandica sp. nov., Tab. nost. II, fig. 21. 



Long: 100 /, lat: 11 //, str. 12 in 10 //, subtiliter punctatis. 



Valva cymbiformi, margine ventral! fere recta. Apicibus acutis. 

 Raphe area byalina angusta, media in parte vulva- in a ream longi- 

 nam, marginem ventralem versus aliquantum dilatata, cincta. 



Egilsta.Mr (E.) B. P. 



Cymbella Jonssoni sp. nov., Tab. nost. II, fig. 22. 



Long: 5() //, lat: 9 //, str. 10 in 10 , apices versus densioribus, 

 indistincte punctatis. 



Valva anguste lanceolata. Raphe area byalina, media in parle 

 valvse in aream asymmetricam dilatata, cincta. Striis per totain 

 valvam radiantibus. 



Owing to the radiating striation and the non-symmetrical central 

 area I assume this form to be a Cymbella. It has probably nothing to 

 do with Cymb. inc. naviculacea. 



Cymbella lanceolata Ehr. Cl. Syn. I, 174. V. H. Trt., Tab. I. fig. 37. 

 99 samples (S. 25, S.W. 20, N. 12. E. 40. s. 1. 2). Hot springs: 2 

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



Var. cormita Ehr. Cl. Syn. 1. c. 0st. D. D., Tab. II, fig. 43. 



8 samples ,S.W. 5, E. 3). 

 Area: Eur. 



Var. ventricosa A. Cl. A. Cl. Finl. P. 19, Tab. I, fig. 17 (C. lane, in- 

 flata). 



Reykjavik S.W. C. H. 0. 

 Area: Eur. 



:;: Cymbella lapponica Grun. Cl. Syn. I, 1(>5, Tab. IV, fig. 28. 

 26 samples S. 5. S.W. 10, N.W.I, N.I. E. 9). Hot spring: 1. 

 Area: Eur. 



Cymbella linearis sp. nov.. Tab. nost. II, fig. 23. 



Long: ()7 //, lat: 6,4 //, str. 12 in 10 /*. 



Valva linear!, apicibus rostratis. Rapbe directa, fissuris termi- 

 nalibus recurvatis. Striis per totam valvam radiantibus, in apicibus 

 deficienlibus, media in parte valvae areolam rotundatam relinquen- 

 tibus, ceterum rapben attingentibus. 



Sta^ashuW (S.W. H. Js. 



Tin's form is without doubt a Cymbella; the peculiar course of the 

 raphe at the apices and the striation radiating throughout, seem to point 



