130 WISCONSIN PETTOPLANKTON 



LAGERHEIMIA SUBSALSA Lemmermann. PI. 30, Figs. 3-4. 



Forschungsbr. a. d. Biol. Stat. zu Flon 6: 193, pi. 5, figs. 2-6. 1898. 

 Chodatella subsalsa Lemmermann, Hedwigia 37: 310. 1898. 



Cells ovoid, with 2-4 delicate setae at each pole. Chloroplast single, 

 laminate, parietal; with one pyrenoid. (Euplanktont). 



Diam. cells (without setae) 2.5-8 /i; length (without setae) 5-12 /x. 

 Setae 7.5-26 p. long. 



Deer (rrr), Geneva (rr). 



LAGERHEIMIA LONGISETA (Lemmermann) Printz. PI. 30, Figs. 8-9. 



Skr. Vidensk. i Kristiania, Mat.-Naturv. Kl. 1913 1 , No. 6: 60. 1914. 



Chodatella longiseta Lemmermann, Hedwigia 37: 310, pi. 10, figs. 11-18. 

 18'98. 



Cells ellipsoid, with a whorl of 4-10 long, hyaline, delicately tapering 

 setae a short distance from each pole. Chloroplast single ( ?), parietal ; 

 without a pyrenoid (?). (Euplanktont). 



Breadth of cells (without setae) 5-8 /*; length (without setae) 9-13 u. 

 Setae 40-55 p. long. 



White Sand (sss). 



The exceedingly long setae at once distinguish the species from all 

 others. The arrangement of the setae in a whorl is best seen in an end 

 view of a cell. 



var. major var. nov. PI. 30, Figs. 10-12. 



Cells ovoid, with somewhat pointed ends. With a whorl of 4-7 setae 

 u short distance from each pole. Cells containing 1-2 laminate pari- 

 etal chloroplasts each with a single pyrenoid. (Euplanktont). 



Breadth of cells (without setae) 12-15 p.; length (without setae) 

 15-22 ^ Setae 45-60 /* long. 



Blake (rr), Little Bass (2) (rrr). 



The variety is distinguished from the typical form by the more 

 pointed and larger cells. 



Lagerheimia citriformis (Snow) comb. nov. PI. 30, Figs. 1-2. 



Chodatella citriformis Snow, Bull. U. S. Fish Comm. 22: 389, pi. 2, figs. 

 S'-S 8 . 1903. 



Cells ovoid to ellipsoid, with a small obtuse projection at each pole. 

 Poles with a whorl of 4-8 long, hyaline, delicately tapering setae at the 



