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Rhopalodia. ( Epithemio ) parallela 0. Mull. 
+ 
Epithemia turgida Kg. 
+ 
— Westermanni Kg. 
4- 
— sorex Kg.’. 
-i- 
+ 
+ 
+ 
+ 
— Ostrupii Prud.. 
+ 
+ 
+ 
— argus Kg. 
+ 
+ 
—- zébra Kg. ... 
+ 
+ 
+ 
+ 
-b 
— — var. porceîlus Kg. 
+ 
~b 
— — var. saxonica Kg. 
+ 
— — var. longissima Perag. 
+ 
— — var. constricta Prud. 
~b 
Eunotia arcus Eh.,. 
+ 
+ 
+ 
+ 
— — var. bidens. 
-h 
— pectinalis Kg. 
-i- 
+ 
+ 
+ 
-b 
— diodon Ehr. 
+ 
— gracilis Rab. 
+ 
— lunaris Grun. 
+ 
-b 
— parallela Ehr.Y. H. Syn. PI. XXXIV fig. 16 • 
+ 
Synedra capitata Ehr... 
-b 
— ulna var. danica Kg. 
+ 
+ 
— — var. longissima W. Sm. 
-b 
— crotonensis var. prolongata Grun. 
+ 
+ 
Fragilaria mutabilis W. Sm.. 
+ 
+ 
~b 
— virescens Ralfs .. 
+ 
+ 
+ 
— construens Ehr... 
-b 
-b 
— Harrissonii W. Sm. 
_L 
Denticula tenuis Kg,. ... 
+ 
1 
-h 
-b 
— — var. frigida Grun. . 
-b 
+ 
+ 
Tabellaria flocculosa Kg... 
+ 
+ 
+ 
— fenestrata Kg. 
+ 
~b 
Hantzschîa amphioxys Grun. 
+ 
Nitzschia ( Grunowia ) sinuata W. Sm... 
"b 
— angustata Grun. 
+ 
+ 
+ 
+ 
— — var acuta. 
-h 
— amphibia Grun. 
+ 
— stagnarum Rab. 
4- 
— linearis W. Sm. 
I 
+ 
+ 
— palea W. Sm...•.. 
+ 
+ 
_L_ 
-b 
H 
— subtilis var. paleacea Grun. V. H. Syn. PI. 
+ 
LXVIII fig. 10. 
— Clausii Hantzsch... 
+ 
— sigmoidea W. Sm. 
+ 
+ 
