PLATE XIV. 



Figure 1. Asterionella glacialis, n. sp. . 



„ 2. Bacteriastrum varians, Lauder, var. princeps, nov. 



„ 3. Ethmodiscus tympanum, n. sp. 

 Figures 4, 4 a, 4 &, and 4 c. Ethmodiscus, sp. (Fragmeuta) 

 Figure 5. Ethmodiscus gigas, n. sp. . 



,, 6. Ethmodiscus ivyvilleanus, n. sp. 

 Figures 7 and 8. Thalassiothrix frauenfeldii (Grun.), Csfcr. 



PAGE 



50 

 84 

 170 

 170 

 169 

 170 

 54 



