WISCONSIN PHYTOPLANETON 131 



base of the polar projections. Chloroplast single, parietal; with one 

 pyrenoid. ( Euplanktont ) . 



Breadth cells (without setae) 8-20 /A; length (without setae) 13-23 p. 

 Setae 25-35 /* long. 



Horse (rrr), Kegonsa (rrr). 



This is the only species with polar projections that resemble the 

 polar nodules of Oocystis. 



LAGERHEIMIA DROESCHERI (Lemmermann) Printz. PI. 30, Figs. 5-7, 



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



Chodatella Droescheri Lemmermann, Ber. d. D. Bot. Ges. 18: 98, pi. 3, fig. 12. 



1900. 



Cells ovoid to ellipsoid; with numerous hyaline delicately tapering 

 setae covering the entire wall. Cells with 2-4 parietal, laminate 

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



Breadth of cells (without setae) 5-12 /<.; length (without setae) 9-16 

 fj.. Setae 15-22 /* long. 



Horse (rrr), Travis (r), Upper Nashotah (rr). 



FRANCEIA Lemmermann 1898. 



Cells ovoid, solitary or in colonies of 2-4; free-floating. Cells en- 

 closed in a delicate gelatinous sheath (?). Entire cell wall covered 

 with delicate hyaline setae that do not taper. Chloroplasts 1-3, pari- 

 etal, laminate, with or without pyrenoids. 



Reproduction by autospores. 



FRANCEIA OVALIS (France) Lemmermann. PI. 31, Fig. 4. 



Hedwigia 37: 308. 1898. 



Phythelios ovalis Franc6, Notarisia 1894: 2, figs. 1-5. 1894. 



Cells ovoid to elliptic; with two chloroplasts. (Euplanktont). 

 Breadth of cells (without setae) 7-10 /*; length (without setae) 13- 

 17 /i. Setae 15-23 /* long. 



Pine Tree (rr). 



The minimal dimensions given above are somewhat smaller than those 

 given by France but I feel that the Wisconsin organism should not be 

 considered a distinct variety until the variation in size of the typical 

 form has been determined more fully. 



The recognition of the genus Franceia is open to question since the 

 characters upon which Lemmermann bases the genus (number of 



