PAPERS BY MEMBERS 83 



during October. 1910. During October. 1912. I found 

 it fruiting abundantly among some Azolla plants sent 

 me from the Missouri Botanical Garden, St. Louis. 

 Oedogonium crenulato-costatum Wittrock. 



Collected from the pond on the Xormal School campus, 

 and from a pond near Wheeler. In the first locality it 

 was abundant on the crayfish living in the pond. Fruits 

 in summer and autumn. 

 Oedogonium crenulato-costatum cylindricum Hirn. 



Occurred during October. 1910. in the Ice Plant pond at 

 Casey. 

 Oedogonium crispum (Hassall) Wittrock. 



Rather rare. Collected in the pond near Lerna. and the 

 Ice pond at Ashmore. during May. 1912. 

 Oedogonium cryptoporum vulgare Wittrock. 



Found in the Ice pond at Casey and the pond southeast 

 of Lerna. 

 Oedogonium cyathigerum Wittrock. 



This species occurs in Hodgen's and Marshall ponds. 

 Fruits during ^^lay. June and July. 

 Oedogonium echinospermum A. Baun. 



Common in the spring of 1912 in wet-weather pools and 

 ponds near Charleston. Ashmore and Oilfield. 

 Oedogonium Franklinianum Wittrock. 



Recorded from Hodgen's pond. Campus pond, and the 

 Tile Factory ponds. Charleston. Fruits in summer 

 and autumn. 

 Oedogonium globosum Xordtstedt. 



Very typical material has been collected from Marshall 

 pond. Charleston and the Lily pond, southeast of Xew- 

 ton. Previously reported from the Hawaian islands 

 and Massachusetts. 

 Oedogonium gacillimum Wittr. & Lund. 



This form is common in ponds and pools. Recorded 

 from Charleston. Dorans, Ashmore and Lerna. 

 Oedogonium grande Kuetzing. 



This is the most common of the Oedogoniums in our 

 streams. It also occurs in the more permanent ponds. 

 It fruits at irregular intervals. It has been collected 

 at Charleston. Greenup. Ashmore. Xewton. Lerna and 

 Humbolt in this state ; and at Decker. Indiana. There 

 are at least three varieties present in the local waters. 

 Oedogonium intermedium Wittrock. 



This species has been previously known only from Eu- 

 rope. Our material, collected from the Marshall pond, 

 Charleston, and Wolfe's pond, near Wheeler, approach- 

 es the form valida. 



