Explanation of Plate II. 
Pag 
Fig. 17. Navieula (Caloneis) disticha A.S.....00. 000. eee 287 
— 18. crucifera Grun.? var. capitata Ost......... 000.0000. 287 
— 19. _ (Caloneis) Sp — gl Rk ete enemas cicanW his 287 
— 20. -- (Diploneis) ocellata Ost..... 0.000.000 000 c cece 291 
— 21. — mediopartita Grove Var. ........ 2. eee 292 
— 22. _ (Pseudoamphiprora) decora Grev. ................00 005 293 
—- 93-24, — subglabra Ost. 0.0. ccc eee ees 296 
— 95. Mastogloia Jelenecki Grun. var.? 0.00... eee ee 300 
— 26. Van Heurckia siamensis Ost. 2.000000... 000 ences 296 
— 27. Scolioplewra siamensis Ost. .....00.0660 000 ee 298 
— 98. Rhoicosphenia tenwissima Ost........0.00.00.0.0 00 cece ce cece eee 303 
— 29, Nitzschia panduriformis Greg. var. interrupta Ost. .............. 306 
— 80. Navicula bipunctata Grun.?... 0. ee 294, 
— 31. Hantzschia marina (Donk.) Grun. var. leptocephala Ost. ......... 310 
— 82. Mastogloia sp. No. 212....0.. 000. cen eee 302 
— 33. _ quadrinotata Ost... 00.0060 301 
— 84, Xantiopywis sp.2? eee eee eee ee BAY 
— 35. Mastogloia parvula Ost... 0.06. 302 
— 36. Mastogloia sp. No.241......00.0 00 eens 302 
All figures have been enlarged 660 times. 
