Lagerheimia longiseta var. major G. M. Smith 1920, p. 130 



PI. 55, Fig. 6 

 A variety differing from the typical by its pointed ovate cells 

 which are considerably larger, 12-15/i, in diameter, 15-22;u, long 

 without setae; setae 45-60/a long; described as having 1-2 chloro- 

 plasts, each with a pyrenoid. 

 Rare; in plankton. Mich., Wis. 



Lagerheimia quadriseta (Lemm. ) G. M. Smith 

 PI. 46, Fig. 11 



Cells ovate, with 2 long, diverging setae arising near the apices; 

 cells 4-6.5/A in diameter, 7.5-12/x long; setae up to 23;u, long. 

 Mich. 



Lagerheimia suhsalsa Lemmermann 1898, p. 193 

 PI. 55, Fig. 7 



Cells ovate, with a tuft of 2-4 setae at the poles; 1 parietal 

 chloroplast with a pyrenoid; cells 2.5-8|U, in diameter, 5-12/;. long 

 without setae; setae 7.5-26/i, long. 



Rare; in plankton. Mich., Wis. 



FRAISICEIA Lemmermann 1898c, p. 307 



Free-floating ovate or ellipsoid cells, solitary or 2-4 together; 

 walls covered with long, slender bristle-like setae which may show 

 a basal swelling or tubercle; chloroplasts 1-4 parietal plates; pyre- 

 noids present or absent. 



This genus should be compared with Lagerheimia in which the 

 setae are confined to the polar or equatorial regions of the cell wall. 



Key to the Species 



Cells ellipsoid; chloroplasts 2-4 F. Droescheri 



Cells ovate; chloroplasts l-2-(3) F. ovalis 



Franceia Droescheri (Lemm.) G. M. Smith 1933, p. 505 



PI. 56, Figs. 1-3 

 Cells broadly ellipsoid, the wall covered with stiff, straight, 

 spine-like bristles without tubercular thickenings at their bases; 

 chloroplasts 2-4 parietal plates; cells 5-12/x in diameter without 

 setae, 9-16ix long; setae 15-22/u. long. 

 Euplankter. Mich., Wis. 



Franceia ovalis (France) Lemmermann 1898c, p. 308 



PI. 56, Fig. 4 



Cells ovate; chloroplasts l-2-(3) parietal plates; cells 7-1 0/a in 

 diameter, 13-17/a long without setae; setae 15-23/<, long. 

 Rare; in plankton. Mich., Wis. 



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