e) Das Leben im See. 



125 



Ratzeburger See 



Clathrocystis aeruginosa 

 Anabaena flos aquae 



„ spiroides 



Pediastrum boryanum 

 „ pertusum 



Staurastrum gracile 

 Volvox 



Asterionella gracillima 

 Melosira 

 Fragilaria crotonensis 



„ virescens 



3Ielosira arenaria 

 Synedra delicatissima 

 Diatoma tenue 

 Ceratium hirudinella 



n n Cysten 



Peridinium tabulatum 

 Glenodinium acutum 

 Dinobryon divergens 

 „ stipitatum 



Codonella lacustris 

 Asplanchna priodonta 

 Synchaeta pectinata 

 Pompholyx sulcata 

 Polyathra platyptera 

 Triarthra longiseta 

 Mastigocerca capucina 

 Anuraea cochlearis 



„ aculeata 



Xotholca longispina 

 Microcodon clavus 

 Daphnella brachyura 

 Dapbnia byalina 



„ Kahlbergensis 

 Bosmina cornuta 



„ coregoni 



„ longirostris 



Leptodora hyaKna 

 Copepodenlarven 

 Cyclops 

 Diaptomus 

 Eurytemora 

 Dreyssenalarve 



1894. 



III. 

 15. 



III. 



20. 



81b I 81d 



III. 

 25. 



+ 



+ 

 + 



+ 



+ 



+ 



+ 

 + 



+ 

 + 



+ 



+ 

 + 



+ 

 + 

 + 



+ 



+ 

 + 



+ 



+ 

 + 



+ 



+ 



+ 



+ 



+ 

 + 



+ 



+ 

 + 



81 f 



V. 



20. 



V. 



25. 



V. 



30. 



+ 



+ 

 + 



+ 



+ 



+ 



+ 

 + 

 + 



+ 

 + 



+ 



+ 



+ 



+ 

 + 

 + 



81h 81 i 



+ 



+ 



+ 



+ 

 + 

 + 



+ 



+ 

 + 

 + 



+ 

 + 



+ 



# 



+ 



+ 



+ 



+ 

 + 



+ 



+ 



+ 



+ 



+ 



+ 

 + 



+ 



+ 

 + 



+ 



+ 



+ 

 + 



+ 

 + 



+ 



+ 



+ 

 + 

 + 



+ 

 + 

 + 

 + 

 + 

 # 



+ 



81k 



+ 

 + 



+ 



+ 



+ 

 + 



+ 

 + 



+ 

 + 



+ 

 + 

 + 



+ 

 + 



+ 

 + 

 + 

 + 

 + 



+ 

 + 



+ 

 + 



+ 



+ 

 + 



+ 



VI. 



4. 



81m 



+ 



+ 



+ 



+ 

 + 

 + 

 + 



+ 



+ 



+ 



+ 

 + 

 + 



+ 



+ 

 + 

 + 

 + 

 + 



+ 



+ 



+ 

 + 



+ 



4- 

 + 



+ 



VI. 



7. 



81 o 



+ 



+ 

 + 



+ 



+ 



+ 

 + 

 + 



+ 



+ 



+ 

 + 

 + 

 + 

 + 



+ 



+ 

 + 

 + 



+ 

 + 

 + 



4- 

 + 

 + 

 + 

 + 



1893. 

 VIII. 



81a 

 + 



+ 



4- 

 + 

 -h 



# 

 4- 

 4- 



4- 

 4- 



4- 

 # 



4- 



# 

 4- 

 4- 

 4- 

 4- 



4- 

 4- 

 4- 



