gg WISCONSIN PHJTOPLANKTON 



KEY TO THE SPECIES. 



Setae restricted to one end of the cell. 

 Apical end with setae. 



Cells cylindrical M. ALPINA 



Cells ovoid M. TONSURATA 



Basal end "with setae M. PKODUCTA 



Setae covering whole cell M. CAUDATA 



MALLOMONAS ALPINA Pascher & Kuttner. PL 12, Fig. 4. 



in Pascher, D. Siisswasserfl. Deutschl., Osterr., u. d. Schw. 2, Flagellatae 2: 36, 

 flg. 58A. 1913. 



Cells ellipsoid to elongate cylindrical, with poles rounded or pointed. 

 Scales rhomboidal, in diagonal rows; with a single, long, straight or 

 curved seta. Setae confined to anterior end of cells. (Euplanktont). 



Cells 8-12 p broad, 25-45 /* long. 



Camp (r). 



MALLOMONAS PRODUCTA (Zacharias) Iwanoff. PI. 12, Fig. 2. 



Bull, de 1'Acad. Imp. d. Sc. de St. Petersbourg 5 Ser., 11: 250, pi. A, figs. 4-6. 

 1899. 



Cells cylindrical, with straight or slightly convex sides, ends rounded 

 and tapering. Scales in regular transverse to diagonal rows, diamond- 

 shaped or laterally elongate. Setae straight or bent, confined to basal 

 portion of cell. Chromatophores two, golden-brown, laminate, and 

 parietal. (Euplanktont). 



Cells 9-13 n broad, 40-70 p long. 



Catfish (sss), Cranberry (ss), Crawling Stone (sss), Lac la Belle (ss), 

 Long (1) (ss), Otter (r), South Turtle (rrr), Upper Nashotah (rr). 



var. MABCHICA Lemmermann. PI. 12, Fig. 3. 

 Zeits. f. Fischeri 1903: 106. 1903. 



Cells shorter and relatively broader. Setae sometimes at both ends 

 of cells. (Euplanktont). 



Cells 11-12 ti broad, 21-26 /z long. 



Nancy (r), Oconomowoc (ss), Tamarack (ss). 



MALLOMONAS TONSURATA Teiling. PI. 12, Fig. 5. 

 Sv. Bot. Tids. 6: 277, fig. 3. 1912. 



Cells ellipsoid, with posterior end rounded and anterior end pointed. 

 Setae confined to anterior third of cell, fairly short and somewhat 

 curved. Scales not regularly arranged. (Euplanktont). 



Cells 7-8 fj. broad, about 18 /x long. 



Waupaca (rr). 



