72 ILLINOIS ACADEMY OF SCIENCE 



Nodularia spumigena Mertens. 



Collected in roadside pools near Decker, Indiana, May, 

 1911 in fruit. Fide Collins. 

 Anabaena catenula (Kuetz.) Bor. & FI. 



Occasionally common in ponds near Charleston and 

 Casey. Produced spores in Marshall pond, May, 1912. 

 Anabaena flos aquae (Lyngb.) Breb. 



Found but once, in the pond just west of the Greenup 

 station south of the Vandalia R. R. It formed a bluish 

 green scum on the water. 

 Anabaena inaequalis Bor. & Fl. 



During May and June it has been recorded for Hodgen's 

 pond and Marshall pond. Produces spores in May. 

 Fide Collins. 

 Anabaena laxa (Rab.) A Braun. 



Found in material collected in Hodgen's pond during 

 September, 1908. Fide Collins. 

 Cylindrospermum muscicola Kuetzing. 



Recorded from Marshall pond. Charleston, and an arti- 

 ficial pond near Sullivan. Fruits during May. Fide 

 Collins. 



Scytonemataceae 



Tolypothrix tenuis Kuetzing. 



Common on submerged objects in the Big Four ponds, 

 Charleston, and the Ice pond, Ashmore. Also collected 

 in w^et-weather pools near Charleston and Oilfield. 



Rivulariaceae , 



Calothrix Kawrayskii Schmidle. 



Common as an epiphyte on green algae in Hodgen's and 

 the Tile Factory ponds. Not previously recorded for 

 North America. Fide Collins. 

 Calothrix stagnalis Gomont. 



Common each year in the Charleston ponds. Fruits in 

 September. Fide Collins. 

 Rivularia natans (Hedw.) AVelw. 



Found abundantly during autumn months in the east Big 

 Four pond. Fruits in October and November. Vege- 

 tative period begins in July. 



Flagellatae 

 Euglenaceae 



Euglena deses Ehrenberg. 



Common in streams carrying some sewage, usually scat- 

 tered among masses of the viridis type. 

 Euglena oblonga Schmitz. 



Very abundant at the Ashmore Ice pond, October, 1912. 



