ne EEE EEE 
ass 
z Ber 
a 
2 
ne 
se 
x 
LE 
at 
re, 
a aa 
For." Te $ 
> 
Fig. 1. Closterium Fig. 2. Closterium Fig. 3. Closterium Fig. 4 Cosmarium 
obtusum Br£eb. var. pusilla lunula (Ehrbg.) var. jenneri (Ralfs). p. 52. granatum Breb. var. 
Hantzsch. p. 51. sublanceolata Klebs. p.51. hexagona Klebs. p. 52. 
Fig. 5. Cosmarium pachy- 
dermum Lundell. p. 52. 
Fig. 7. Scenedesmus 
caudatus Corda var. setosa 
Kirchner. p. 54. 
CR 
EIEKE 
[an aa | an au | 
& QD | 09 09 
CE: 
GE) 
WELLEN 
Bulsul. = 
& 
a. b. c. 
Fig. 6 a—c. Tetraspora bullosa Ag. p. 53. 
Fig. 8. Cyphoderia ampulla (Ehrbg.) Leidy. p. 62. 
