-2- 



Desmogonium - 274,293 



Detonula - 320,321 



Diatoma - 267 



Diatoraella - 370.403 



Eoithemia - 249-252 



Eunotia - 269-271,273,274,285- 291,293,294,297,381,382 



Frapilaria - 296- 299,307 



FragilarioDsis - 299 



Frlckea - 264 



Frustulla - 264,369,406 



Gomorocymbella - 294.373 



Gomryhonema - 247,248,266,357 



Gomohonitzschia- 332,333 



Gomnronleura - 247 



Goasleriella - 384 



Grammonema - 297 



HnntzBChla - 329,345 



Homoeocladla - 336 



Lauderla - 320 



Lentocylincirus - 321 



Mastogloia - 35e,367,368 



Merldl on - 267, 268 



Npvicula - 243,244,257-260,262-254,271,272, 

 295,297,299,312 370,392-4^5 



Neidlura - 264 



Nitzschia - 330-336, 345-352 



