84 WISCONSIN PHYTOPLANKTON 



and arranged around a common center. Chromatophore single, cup- 

 shaped to disciform, without a pyrenoid. (Euplanktont). 



Diam. cells 6-13 p.. 



Clear (rr), Waubesa (rrr). 



This is the B. Braunii Ktz. of the preliminary list, the identification 

 being based upon G. S. West's description of B. Braunii in his British 

 Freshwater Algae. Dr. West has since informed me that the Ineffigiata 

 neglecta of that work is B. Braunii Ktz. and the B. Braunii described 

 therein is B. sudeticus Lemm. 



BOTRYOCOCCUS BRAUNII Kutzing. PI. 15, Fig. 5. 



Species algarum 892. 1849; Fresenius, Abh. Senckenb. Naturf. Ges. 2: 239, 

 pi. 11, figs. 27-33. 1858. 



Ineffigiata neglecta W. & G. S. West, Jour. Roy. Micr. Soc. 1897: 503. 1897; 

 Jour, of Bot. 41: 80, pi. 447, figs. 1-6. 1903. 



Cells joined in small free-floating colonies of irregular shape that are 

 without a conspicuous gelatinous envelope but completely enclosed by 

 a tough, elastic, hyaline to orange colored membrane that is pro- 

 duced into irregular wrinkles, folds, and spines. Colonies frequently 

 united to form compound colonies by long delicate projections of the 

 colonial envelope. Cells ovoid or ellipsoid in shape and forming a 

 single layer around a central cavity. Chromatophore single, cup-shaped 

 to laminate, yellowish-green to nearly grass-green in color, without a 

 pyrenoid. Assimilation product a reddish oil that may color the whole 

 colony a brick red. (Facultative planktont). 



Cells 3.5-5.5 /* broad, 5.7-10.5 /i long. Simple colonies up to 100 p. 

 in diam. ; compound colonies up to 1.5 mm. 



Balsam (rr), Bear (3) (rr), Bear Trap (rrr), Beaver (2) (rr), Beaverdam 

 (ss), Birch Island (rrr), Birch (2) (rr), Boulder (rrr), Browns (sss), Camp 

 (rrr), Carson (r), Center (r), Chain (rrr), Chetac (rr), Clam (rrr), Clare 

 (r), Cochrane (rrr), Crawling Stone (rr), Crooked (sss), Deer (rr), Delavan 

 (rrr), Des Moines (rr), Devils (1) (r), Devils (2) (r), Devils (3) (rrr), 

 East (rr), Elizabeth (rr), Green (1) (rr), Green (2) (rrr), Grindstone (r), 

 High (rr), Horse (rrr), Horseshoe (1) (rr), Island (rr), Jennie (rr), Jones 

 (rrr), Kawaguesaga (rrr), Kegonsa (r), Kimball (rrr), Kitten (rrr), Lac 

 Court Oreilles (sss), Lac du Flambeau (rrr), Little Bass (1) (rrr), Little 

 Butternut (rrr), Little Crooked (rrr), Little Doctor (rr), Little Rice (1) (rr), 

 Long (1) (rrr), Lower Nashotah (r), Lynx (rr), Mary (sss), Mendota (ss), 

 Mercer (rrr), Mill (rrr), Monona (sss), Mud (3) (rrr), Mud Hen (sss), Nancy 

 (r), Nicaboyne (rrr), No Mans (rr), Paddock (r), Palmer (rrr), Pardee (sss), 

 Pike (rrr), Pokegama (1) (rrr), Pokegama (2) (rrr), Poor Farm (rrr), Re- 

 serve (rr), Rice (1) (rr), Round (2) (rrr), St. Croix (rrr), Sand (1) (r), 

 Sand (2) (rr), Sand (3) (rr), Sand (4) (rrr), Shell (rr), Silver (2) (r), 

 Sishebogema (rr), South Turtle (rr), Spirit (rrr), Tied Canoe (rrr), Travis 

 (rrr), Upper Nashotah (sss), Wapagossett (rr), Waubesa (r), White Ash 

 (rrr), Whitefish (rrr), Wildcat (rrr), Winnebago (rrr), Wolf (rrr). 



