98 



PLATE V. 



Fig. US. Hant/sdiia dubravicensis Grim. 



- 09. Hant/scliia trimcata sp. nov. 



70. Hant/scliia forma abnormis. 



71. Nit/.schia angustata \V. Sin.) (irun. forma. 

 7'J. Nit/.schia Jonssoni sp. nov. 



7.'5. Nit/schia glaberrima sp. nov. 



74. Nitzscbia mucronata sp. nov. 



7."). Kunotia islandica sp. nov. 



76. SyiR'dra rumpens Ktz. var. islandica var. nov. 



77. Syncdra I'lua (Nitzsch) Ehr. f. arcuata. 

 7.S. Fragilaria Bacillus sp. nov. 



7i). Fragilaria mutabilis W. Sm.) Grun. var. inflata var. nov 



- 80. Fragilaria rbombica sp. nov. 

 ( S1. Fragilaria triuudulata sp. nov. 



- 82. Fragilaria undata YV. Sm. forma. 



- 83. Denticula islandica sp. nov. 

 84. Melosira Stcfanssoni sp. nov. 



