LIST OF ILLUSTKATIONS. 
Spirogyra .... 
PLATE 
i 
FIG 
1-6 
PAGE 
7 
Toxonidea Gregoriana 
ii 
9 
15 
Donkinia carinata . 
10 
ib. 
Amphiprora maxima 
>> 
11 
ib. 
Diadesmis Williamsonii . 
12 
ib. 
Triceratium striolatum . 
hi 
13 
23 
Amphitetras antediluviana 
» 
14 
ib. 
Closterium Liebleinii 
•> 
15 
ib. 
,, striolatum 
IV 
16 
31 
Eua strum oblongum — front view 
>J 
17 
ib. 
„ „ side view 
)) 
18 
ib. 
Micrasterias rotata . 
}) 
19 
ib. 
Cosmarium margaritiferum 
V 
20 
39 
„ „ empty frond 
)> 
21 
ib. 
„ „ end view 
» 
22 
ib. 
Ankistrodesmus falcatus 
23 
ib. 
Collecting bottle 
>» 
24 
ib. 
Navi cula didyma . 
)> 
25 
ib. 
Pinnularia major . 
J> 
26 
ib. 
Isthmia enervis 
VI 
27 
47 
Amphitetras antediluviana 
J> 
28 
ib. 
Licmophora flabellata 
VII 
29 
55 
„ „ fan 
5> 
30 
ib. 
Mastogloia Danseii 
VIII 
31 
63 
Dickieia ulvoides 
>> 
32 
ib. 
,, pinnata . 
» 
33 
ib. 
Berkeleya fragilis . . . 
»> 
34 
ib. 
Cocconeis major . . , 
H 
38 
ib. 
„ nitida 
it 
39 
ib. 
