PLATE J. 
[All the Figures in the work are magnified 500 diameters, unless it is 
specially stated to the contrary. ] 
Fig. 1. Navicuta ayauina, Donkin. 
2. Navicua LitroRaLis, Donkin. 
8. Navicu.a astiva, Donkin. 
4. Navicuna Smirait, De Brébisson. 
5. Navicuxa rusca, Gregory. 
6a & 66. Navicuts exviiprica, Kiitzing. 
7. Navicuna nitgscens, Gregory. 
8. Navicuna Lingata, Donkin. 
9. NAVICULA SUBORBICULARIS, Gregory. 
10. Navicuta pyemaa, Kiitzing. 
