— 120 — 



4. 1 — 3 Cerataulus turgidus Ehr. 

 4 — 6 s laevis Ehr. 



7 — 8 * turgidus Ehr. 



9 ? Pacificus Grün. 



10 * turgidus Ehr. 



11 — 13 Isthmia Capensis Grün. 

 14 s nervosa Kg. 



5. **1 



2 Triceratium Sol. 



3 Heniiaulus Hauckii Grün. 



4 — 6 Terpsinoe Brebissonii (Kg.) Grün. 

 7 — 9 * Arnericana Bau. 



*10— 11 Fragilaria 



12 Rhabdonema arcuatum Kg. 



13 - Adriaticuni Kg. 



14 Fragilaria Schwarzii Grün. 



15 Plagiogramma elongatum Grev. 



16 * validum Grev. 



17 Amphora Proteus Greg. 

 *18 Amphora 



19 Raphoneis Amphiceros Ehr. 



20 Nitzschia Tryblionella var. ambigua Grün. 



21 Rhoiconeis Bolleana Grün. 



22 Achnanthes longipes Ag. 



23 Amphora naviformis Leud. Fort. 



24 = obtusa Greg. 



25 * Porcellus Kitt. 



26 Nitzschia panduriformis Greg. 



27 = Trybhonella var. maxima Grün. 



28 Amphora exornata Jan. 



29 * Pecten Brun. 

 *30 Rhabdonema 



*31 Rhoiconeis 

 *32— 33 Achnanthes 



6. 1 Grammatophora serpentina Ehr. 



2 Nitzschia panduriformis Greg. 



3 Tryblionella punctata Sm. 



4 Nitzschia granulata Gran. 



5 Cocconeis Scutellum Ehr. 



6 Campyloneis Grevillei Sm. 



7 Orthoneis fimbriata (Bright.) Grün. 



8 Cocconeis arctica Cl. 



