— 75 — 



7 Biddulphia aurita Breb. 



8 Triceratium sculptum Shad. var. 



9 = alternans Bau. 



10 « junctum A. Schm. 



11 Rhabdonema Adriaticum Kg. 

 12—14 Biddulphia Baileyi Sm. 



15 — 16 = granulata Roper. 



17 — 18 Isthmia enervis Ehr. 



1 — 3 Achnanthes brevipes Ag. 



4 Rhaphoneis Rhombus Grün. 



5 * Surirella var. Australis Pet. 



6 = Amphiceros Ehr. 

 *7 Surirella 



8 Tryblionella marginata Sm. 



9 Cocconeis dirupta Greg. 

 *10 Cocconeis 



*11 Cocconeis 

 *12 Cocconeis 

 *13 Cocconeis 



14 Nitzschia apiculata (Greg.) Grün. 



15 Epithemia marina Donk. 

 *16 Amphora 



17 * micans A. Schm. 



18 * obtusa Greg. 

 19—20 * robusta Greg. 



21 * spectabilis Greg. 



22 Nitzschia panduriformis Greg. 



23 Amphiprora alata Kg. 



24 — 25 Grammatophora serpentina Ralfs. 



26 Toxonidea insignis Donk. 



27 Pleurosigma lanceolatum Donk. 



28 Donkinia recta (Donk.) Grün. 



29 Pleurosigma Fasciola Sm. 



30 Surirella comis A. Schm. 



31 s Mexicana A. Schm. 



32 * hybrida Grün. 



33 * ocellata Castr. 



34 = Collare A. Schm. 



1 Pleurosigma formosum Sm. 



2 Synedra Baculus Greg. 



3 Pleurosigma strigilis Sm. 



4 * decorum Sm. 



