LIST OF ILLUSTRATIONS. 



Spirogyra . . . 

 Toxonidea Gregoriana 

 Donkinia carinata . 

 Amphiprora maxima 

 Diaclesmis Willi amsonii . 

 Triceratium striolatum . 

 Amphitetras antediliiviana 

 Closterium Liebleinii 



,, striolatum 



Euastrum oblongum — front view 



,, „ side view 



Micrasterias rotata . 

 Cosmarium margaritiferam 



,, „ empty frond 



,, „ end view 



Ankistrodesmus falcafrus 

 Collecting bottle 

 Navicula didyma . 

 Pinnularia major . 

 Isthmia enervis 

 Amphitetras antediluviana 

 Licmopliora flabellata 



,, v f an 



Mastogloia Danseii 

 Dickieia ulvoides 



,, pinnata 

 Berkeleya fragilis . 

 Cocconeis major 

 nitida 



PLATE 



FIG 



PAGE 



I 



1-6 



7 



II 



9 



15 



J5 



10 



ib. 



„ 



11 



ib. 



5> 



12 



ib. 



III 



13 



23 



„ 



14 



h. 



., 



15 



ib. 



IV 



16 



31 



S) 



17 



ib. 



,, 



18 



ib. 



)> 



19 



ib. 



V 



20 



39 



>> 



21 



ib. 



J5 



22 



ib. 



55 



23 



ib. 



„ 



24 



ib. 



55 



25 



ib. 



,, 



26 



ib. 



VI 



27 



47 



„ 



28 



ib. 



VII 



29 



55 



55 



30 



ib. 



VIII 



31 



63 



,, 



32 



ib. 



j; 



33 



ib. 



» 



34 



ib. 



55 



38 



ib. 



>» 



39 



ib. 



