Explanation of Plate I. 
. 1, Actinoptychus moronensis (Grev.) Cl. var. nov. guttata Ost........ 
2. Cyclotella transsylvanica Pant. var. dessiminato-punctata Pant... . 
3a. Euphyllodium spathulatum Shadbolt............-..00 eee e eee 
b. _ = _ Structure >< 1500 .......... 
& - = = BPrusttile:js:scsaseraacaney at 
A, Tracer ntiwm Spies nica oo84 gla 68849 ROR g GRE OEE A glen de daa ery 
5, MUTI: PECENS GILG 5 ans Voce te othe eh See e Bes See eS 
6. Rhaphoneis bilineata Cl. & Grun. var. contracta Grun.?.........- 
7. Navicula balatonts Pant, «csi ccc cares ceased sans seem aes 
8. Glyphodesmis siamensis Ost. forma minor .............0...0 065. 
9. — _ Sd aaadiinh 4 Sine dee anes Meo SEES 
10. Navicula (Pinnularia) Farcimen Ost.................. in 
11. —  (Caloneis) siamensis Ost. .........0..0 600000 c ees 
12. Cyclophora siamensis Ost... 2.000.000.0060 c cece ees 
13. Striatella delicatwla (Ktz.) Grun. var. gibbosa Ost..............-. 
14, Achnanthes mammalis Cast 
16. _ _— - = - — Epitheca.......... 
With exception of fig. 3b, the figures have been enlarged 660 times. 
Pag. 
270 
268 
278 
278 
278 
973 
275 
280 
286 
281 
280 
286 
987 
283 
276 
283 
