WISCONSIN PHYTOPLANKTON 



Inland (rr), Lac du Flambeau (sss), Little Bass (2) (rr), Little Butternut 

 (rr), Little Crooked (rrr), Little Doctor (rr), Loveless (rrr), Lower Nah- 

 otah (rrr), Lower Turtle (rr), Mary (rr), Mendota (sss), Mill (rrr), Mud (.2) 

 (rr), Nancy (rrr), Oconomowoc (rr), Otter (rrr), Pewaukee (rrr), Pine Tree 

 (rrr), Pokegama (1) (rr), Pokegama (2) (rr), Poor Farm (rrr), Pope (rrr), 

 Prairie (rrr), Round (1) (rrr), Sand (1) (rr), Sand (4) (rr), Shell (rrr). 

 Silver (1) (rr), South Turtle (rr), Squirrel (rr), Tenderfoot (rr), Tied Canoe 

 (rrr), Travis (rrr), Vermilion (rr), White Ash (rrr), White Sand (rrr), 

 Wolf (rrr). 



A species that is found in all types of lakes. 



COELASTRUM CAMBRicuM Archer. PL 42, Figs. 2-3. 



Quart. Jour. Micr. Sci. N. S. 8: 65. 1868; W. West, Jour, of Bot. 31: 99, pi. 

 333, fig. 14. 1893. 



Coenobia spherical, of 8-16-32-64-128 (generally 32) cells. Cells 

 spherical, with a single truncate projection on the outer face. Each, 

 cell connected to adjacent ones by short, somewhat flattened, gelatinou* 

 projections. Small circular or triangular interstices between the cells. 

 (Facultative Planktont). 



Diam. cells (with sheath) 6-21 /*, (without sheath) 5-18 /A. Diam. 

 eoenobia 20-100 /*. 



Balsam (rrr), Bear (2) (rr), Beaverdam (rr), Birch Island (rrr), Blue 

 Gill (rrr), Catfish (rr), Cochrane (rrr), Cranberry (rr), East (rr), Found 

 (rr), Hillman (rrr), Jag (rr), Little Bass (2) (r), Mercer (rr), Middle Mc- 

 Kenzie (rrr), Minocqua (rr), Nancy (rrr), Nicaboyne (rr), Old Taylors (rrr), 

 Owen (rrr), Pine (1) (rr), Pine Tree (rr), Pokegama (1) (rr), Prairie (rr), 

 Rudolph (rrr), St. Croix (rr), Silver (1) (rr), Streitor (rr), Travis (r), 

 Wild Goose (rrr). 



COELASTRUM RECTICULATUM (Dangeard) Senn. PL 42, Figs. 4-6. 

 Bot.^Ztg. 57: 66, pi. 2, figs. 1-10. 1899. 



Coenobia spherical, of 8-16-32 cells ; generally held in multiple eoe- 

 nobia by the remains of old mother cell walls. Cells spherical, enclosed 

 by a narrow gelatinous sheath and connected to adjacent cells by 6-9 

 long, slender, tough, gelatinous processes. (Facultative Planktont). 



Diam. cells (with sheath) 6-24 /x. Diam. eoenobia 10-65 //.. 



Bear Trap (rrr), Bear (3) (rr), Beaverdam (rrr), Big McKenzie (rrr). 

 Birch (2) (rr), Blake (rrr), Browns (ss), Camp (rr), Fish (rr), High (rrr), 

 Island (rr), Lac Court Oreilles (rr), Little Bass (2) (rr), Mary (rr), Mendota 

 (rr), Mud (1) (rr), Mudhen (rr), Nancy (rr), North Twin (rrr), Palmer (rr). 



The long processes connecting the cells distinguish this species from, 

 all others. Solitary eoenobia are rarely met with since the long proc- 

 esses hinder the escape of young eoenobia. 



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