im Sommer 1904 auf die biologischen Verhältnisse der Elbe bei Hamburg. 
1904 
1904 1905 
o | Untere || „| Untere = = 
= EI l = = 
23] ie E a Das Phytoplankton. September |S|September 
= 2|2|3 2 = zZ 
=|2|2|82 223 E n 
S\2|33° 121353 9. |18.|20.|27.|30.|11.]|5. |12.|19.|26.| 3. |1o. 
I I I 
+ Amphora angularis Greg. var. Iyrata (Greg.) V. H. + 
++ ++ + n OvalseRtze re ee + ++ +4/41 +++] |+ 
tl lat „ ar an sa(lKtzoEVeRe tete olatzlatıei 
+ +++ ” „. pedieulus (Ktz.) V.H...|+| + ++ 
+ Gomphonema anmustatume tz e een ee: En 
-F -+ ” „ forma gomphocym- 
bellae” (ähnlich A. S. Atl. 234.21)... + 
a8 + A capıtatum Dhraree een. = + ++ 
+ + - eonsthiebumnEihr. u. errene en. Ez ES 
++ ss EXIOUUMRUZE eg re : + |+ 
+ A milcatumaktze ze seen. + 
Ir n MICHOPUSBRUZE Eee ee En 
Sr SF n montanum Schum. ...............- + + 
4 m ‚ var.subelavatum Grun. E= 
+ ee naviculoides Stroese ec = - 
Ar n olivaceum (Lyngb.) Ktz............ En 
+ + “ Parvaluml Ktzepe nn re E- ++ 
Sar ++ „ var. subcapitatum V. H. + |+J |++1l |+1 ++ 
++/ |+l+] I+1+ Rhoieosphenia curvata EZARGTEUNGERRe + +++ + Fl 
+ [++] +141+l1Coceoneis pedieulus Ehr. ................22200- +++] I+1+/1+ + |+ 
3= & pellueida Grun. forma .............- 
+ +++ 4141+ a placentula Ehr. ............. a BE BE BE EEE NE ENTE EEE EEE 
rar en Beutel mehrere AudL 
Snar -E- EapatyasVaHser ee + |+ + 
Ez Achnanthes Biasolettiana (KTZAOLGRUN ee r + 
+ “s delicatula (Ktz.)LGrUn. .. ........... = 
+ , Haucktanan@mungee ar + 
+ % hunganican Gruner er Nr + 
Ar + |+ ” lanceolata (Breb.) Grun. ..... ....-. u E= + 
— = IINERTIS VERS ee were ar SU 
| ++ Rx Daryulankttz ee ee ++ +'+ 
Ze subsessilis-Kize ee... PR AEENE + 
+ +! I+[+ Bacillaria paradoxa (Gmel.) Grun. .... ...... + +++ +++ 
== ” ”  yam tropiea Grun. _ 
+ |+ [|+ 5 socialis Greg. re + un + 
AP 5 „ var. baltica Grun.. + 
+/+1+/+441+/4|4+J| Nitzschia acicularis (RSEZAEWV SIDE ee +++ 414+ 44141441414 
Selem rn = n set angustioriÜ! 
Müller... + |+ 
+ „ “ „ „ var. elosterioides 
GrUnEn..% + 
+ + 5 amphibiazChrungeeee ee een +| |+J+ + 
+ Be angularis W. Sm. var. affinis Grun..:.. + 
+ + + 5 angustata (W. Sm.) Grun. .... ....... + ++ 
+ |+) I+ 5; var. curtaV.MH. + + 
+ + [+| |+[+ ” apieulata (Greg.) "Grun. tar + ++/+ ++ 
+ ++/+ . biplacata Mereschk. .. ............... + ++ 
Ir cn Faldak Gruner Pe ee ee = 
el ziel 3 eircumsuta (Bail.) Grun. ... ....... ++ |+ 
+ + “r communis Rab. var. obtusa Grun. ; E= 
Sr n game lb bavesues era nn au 
+ 5 denticula Grun. var. Delognei Grun.. Ar 
+ ” dissipata (Ktz.)Grun. ........-........ + 
