— 76 — 



5 Pleurosigma elongatum Sm. 



6 * angulatum Sm. 



7 * elongatum Sm. 



8 Nitzschia Sigma Sm. var. Sigmatella. 



9 Pleurosigma rigidum Sm. 



10 = balticum Sm. 



11 * strigosum Sm. 



12 = quadratum Sm. 

 13 — 14 Amphiprora elegans Sm. 



15 Stauroneis pulchella Sm. 



16 Nitzschia circumsuta (Bau.) Grün. 

 *17 Fragilaria 



18 Scoliopleura tumidum Rabh. 

 19—20 Rhabdonema 



21 Stauroneis pulchella Sm. 



22 Scoliopleura convexa Grün. 

 23—24 Synedra Gallioni Ehr. 



25 Nitzschia virgata Roper. 



26 * Sigma Sm. 



27 Pleurosigma Hippocampus Sm. 



28 = littorale Sm. 



29 * Spenceri Sm. var. curvula. 



30 Navicula directa Sm. 



31 * distans Sm. 



32 s maxima Greg. 

 33—34 * Trevelyana Donk. 



35 Fragilaria spec. 

 *36 Stauroneis 

 37 — 39 Rhabdonema arcuatum Kg. 



1 Stauroneis Crucicula Sm. 



2 Navicula forcipata Grev. 



3 * pusilla Sm. 



4 * interrupta Kg. var. 



5 • subsalina Donk. 



6 = notabilis Grev. 



7 * abrupta Greg. 



8 * gemmata Grev. 



9 Stauroneis pulchella Sm. 



10 Navicula consimilis A. Schm. 



11 s cancellata Donk. 



12 * Bombus Ehr. 



13 * didyma Kg. 

 *14 Navicula 



