Lake Maxinkuckee, Physical and Biological Survey 115 



On August 1, a haul was taken in Lost Lake, but little was ob- 

 tained. August 7, a haul from Chadwick's pier across to the ice 

 office; a calm, cloudy morning after a rain; there was obtained 

 mostly Botryococcus, some Lyngbya, and a little Daphnia. 



On August 21, a visit was made to Winona Lake or Eagle Lake, 

 near Warsaw, and 2 hauls were taken. It may prove interesting 

 to mention results for comparison with the plankton of Lake Max- 

 inkuckee. The plankton mass was blue-green material, turning 

 brown, and was composed of the following elements: 



Lyngbya xstuarii, main mass, longer filaments and more 

 abundant than at Lake Maxinkuckee; Microcystis aeruginosa, 

 abundant, taking the place of Anabaena at Lake Maxinkuckee; 

 Gomphonema aporica, common; rotifers, many; naupilii, common; 

 Anuria cochlearis, common; Ceratium hirundinella , many; Cem- 

 tium tripos, a few; Volvox aureus, a few; Cyclops, a few; Daphnia, 

 a few. 



August 28. Outlet Bay in the morning; material fibrous, dirty 

 brown ; many empty sheaths of Lyngbya ; Botryococcus, Chydorus 

 and Daphnia. Lyngbya greatly increased by noon, evident to the 

 eye on the surface, and diffused Anabaena in clumps, rising to the 

 surface and collecting along shore. 



September 5. A haul across Outlet Bay in the morning; mostly 

 entomostraca (Daphnia), and Lyngbya. The Lyngbya still form- 

 ing hormogonia. The long spines of the Daphnia projecting from 

 the net gave the mass a bristly appearance. 



Up to November 12, the plankton hauls had been taken occa- 

 sionally with apparently the same results. On this date the haul 

 examined showed a marked change; Asterionella, and Tabellaria 

 fenestrate, two species of diatoms, were abundant; Cyclops, and 

 naupilii, Anuraea, Microcystis aeruginosa, and a little Anabaena 

 were present. A filamentous alga not known was abundant, tak- 

 ing the place of Lyngbya in summer ; there were also a few colonial 

 rotifers. On November 13, a plankton haul was taken with much 

 the same results, the material being mainly diatomaceous. 



In 1908, a few hauls were made ; one on August 22, which con- 

 sisted of Vorticella, Lyngbya and a little Anabaena. On the night 

 of August 26, a haul made in Lost Lake, consisted of many Corethra 

 larvae, many Cyclops, Daphnia, a few water-mites, some rotifers, 

 and a little Microcystis. 



The marked difference between the plankton of Lost Lake and 

 that of Lake Maxinkuckee was significant; that of Lost Lake ap- 

 proaches rather that of Winona Lake. Indeed, from a comparison 

 of the plankton elements of various lakes it appears that the dif- 

 ferences in their plankton flora and fauna are not those of isola- 



