WISCONSIN PEJTOPLANKTON 



var. irregularis var. nov. PI. 35, Fig. 1. 



Apices of cells twisted and frequently not pointing in the same direc- 

 tion. (Facultative Planktont). 

 Cells 4r-6 /A broad, 6-13 ^ long. 



Cochrane (rr), Pokegama (1) (r), Tenderfoot (rr). 



Although the cell apices of K. lunaris var. dianae are sometimes not 

 in the same plane, they never exhibit the twisting found in this variety. 

 The twisting of the cells of this variety is similar to that of K. contorta 

 but they have the shape and pointed ends that characterize K. lunaris. 



KIRCHNERIELLA OBESA (W. West) Schmidle. PI. 35, Figs. 2-3. 



Ber. d. Naturf. Ges. zu Freiburg i. B. 7: 16 (83). 1893; G. S. West, Brit. 

 Freshw. Algae 226, figs. 96A-96B. 1904. 



Cells flattened with outer side markedly convex and inner sides 

 parallel, ends rounded and tapering slightly. Chloroplast single, fill- 

 ing the entire cell with the exception of a small portion on the con- 

 cave side; with one pyrenoid. (Facultative Planktont). 



Cells 3-8 /i broad, 6-16 M long. 



Bear (2) (rr), Bear Trap (rr), Camp (rr), Catherine (rr), Center (r), 

 Chain (rr), Chetac (r), Crawling Stone (rrr), Devils (1) (rrr), Hillman (rr), 

 Kitten (rr), Lac Court Oreilles (ss), Lac du Flambeau (rr), Mendota (r), 

 Palmer (rrr), Pine Tree (rr), Pokegama (2) (rr), Poor Farm (rr), Reserve 

 (rr), Rice (1) (rr), Rock (rrr), Sand (4) (rr), South Turtle (rr), White- 

 fish (rrr), Wildcat (rr), Winnebago (rr). 



The cells of this species might be described as thick discs incised a 

 third to a half the width of the cell did not other members of the genus 

 show that this effect is produced by a curving of the cell. 



var. MAJOR (Bernard) G. M. Smith. PI. 35, Fig. 4. 

 Trans. Wis. Acad. Sci., Arts, & Lett. 19 1 : 636, pi. 10, fig. 7. 1918. 



Inner face between cell apices curved; apices not close together, 

 rounded and slightly tapering. (Facultative Planktont). 

 Cells 3-5 n broad, 8-21 p. long. 



Carson (rr), Lac Court Oreilles (r), Wolf (rr). 



This variety has a large open space between the apices whereas in 

 the typical form this space is narrow and with parallel sides. The cells 

 are also much narrower in proportion to their length. Brunnthaler 

 (in Pascher, Siisswasserfl. Deutschl. Osterr. u. d. Schw. 5 2 : 180. 1915) 

 has placed the alga as a form of K . lunaris var. dianae but the cell apices 

 are too rounded to consider it a variety of K. lunaris. 



