412 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



[Vol. 10 



Genus spirogyra Link 



Spirogyra lutetiana Petit. 

 Odessa, I. 



Sterile species of Spirogyra occurred in collections from Fort 

 Totten, Cut-off Pond, Stump Lake, Odessa, I, slough below 



Wheeler's Ponds, and Painted Woods Lake, the latter, judging 

 from the size of the filaments, being probably Sp. maxima (Hass.) 

 Wittr. 



Family Mesocarpaceae 

 Genus mougiotia Ag. 



Mougiotia calcarea (Cleve) Wittr. 

 Odessa, I. 



Sterile forms of the genus were observed from Crooked Lake 

 and Painted Woods Lake. 



Order VOLVOCALES 



Family Volvocaceae 



Genus pandorina Bory 



Pandorina morum (Mull.) Bory. 



Odessa, I; Minnewaukon Bay, below grade 



Genus eudorina Ehr. 



Eudorina elegans Ehr. 



Mouth of Minnewaukon Bay, Devils Lake, below grade 

 South Washington Lake (16-celled colonies). 



Genus volvox Linn. 



Volvox globator Linn. 

 Wheeler's Pond, I. 



? V. mononae G. M. Smith, Wis. Geol. & Nat. Hist. Surv. Bull 

 57: 99. pi 18, f. 1. 1920. 



Mouth of Minnewaukon Bay, Devils Lake, below grade. 

 Probably this species but rather too badly preserved for I 

 certain determination. 



