— 126 — 



4. 1 — 2 Cerataulus Johnsonianus (Grev.) 



3 * turgidus Ehr. 



4—7 Isthmia nervosa Kg. 



8 Gramm atophora longissima Pet. 



9 — 10 Rhabdonema arcuatum Kg. var. Californica. 

 11 — 12 = Crozierii Sm. 



13 — 14 * Adriaticum Kg. 



15 Climacosira mirifica Grün. 



5. 1 Hemiaulus ambiguus Jan. 

 2 Fragilaria dubia Grün. 



3 — 4 Epithemia Musculus Kg. 



5 * ventricosa Kg. 

 6 — 8 * Musculus Kg. 



9 Grammatophora hamulifera var. constricta Grün. 

 10—11 * Epsilon Grün. 



12 * lyrata Grün. 



*13 Grammatophora 

 14 — 15 = maxima Grün. 



16 — 17 Amphora quadrata Breb. 



18 = fusca A. Schm. 



19 * marina Sm. 



20 = gigantea Grün. 



21 = obtusa Greg. 



22 = spectabilis Greg. 



23 Climacosphenia moniligera Ehr. 



24 Nitzschia panduriformis Greg. 



25 Cymbosira cuneata Grün. 

 *26 Nitzschia 



27 * Sigma Sm. 

 28 — 29 * fasciculata Grün. 



30 Rhaphoneis Amphiceros Ehr. 

 *31 Fragilaria 

 32 — 33 Nitzschia Formica Hantzsch. 



34 Tryblionella punctata Sm. 



35 Achnanthidium coarcticum Breb. 



36 Rhoiconeis Bolleana Grün. 



37 * Garkeana Grün. 



6. *1 Isthmia 



2 — 4 Climacosphenia elongata Bail. 

 *5 Pleurosigma 



6 Synedra formosa Hantzsch. 



7 Pleurosigma Balticum Sm. 



