IOWA ACADEMY OF SCIENCES. 
25 
ing the ciliate motile bodies, breaks up into a large number 
of minute amoeboid masses, which frequently coalesce 
after the manner of the gonidia of smuts. The pale red- 
dish motile cells of the red condition of the plant were 
also studied in the laboratory at Fayette, and were 
found to be somewhat more slender and elongated and 
more changeable in form than the forms produced from 
the more common green condition of the plant. 
Volvox glohaior (L.) Ehrenb. and Eudorina elegans Ehrenb. 
were both collected in ponds at Fayette during the summer 
of 1902, the latter being new to the flora of the state. Be- 
sides these two specimens, there has occurred frequently in 
both localities compact brownish colonies, about the size of 
a Pandorina morum colony, with individuals densely packed 
in the spherical colonies and considerably elongated. 
It may well be doubted whether Euglenas should be re- 
ported as alg^e, but besides the common Euglena viridis 
(Schrank) Ehrenb., the exceedingly mre Euglena spirogyra 
Ehrenb. was discovered in the college aquarium at Fayette, 
in October 1899. It multiplied rapidly until it gave the water 
the characteristic greenish color, and remained in larger or 
smaller numbers for more than a year. The organisms are 
more elongated than the ordinary Euglena viridis^ are less 
changeable in form and show, at maturity, the spiral bands 
of chlorophyll very plainly. Euglena sgirogyra has not 
been previously reported from Iowa, if indeed from any 
American locality. 
A form of Pediastrum was frequently noted at Fayette, 
but the species has not been determined. Hydrodiciyon 
reticulatum (L.) Lagerh, was only collected in the Volga 
river at this place two or three times. Scemdesmus quad- 
ricauda (Turp.) Breb. is very common at both localities and 
var. abundans Kirchn. is quite as common, Scenedesmus 
obliquus (Turp.) Kuetz. and the variety dimorphus (Turp.) 
Eabenh. are also quite common at Fayette. None of these 
species of Scenedesmus have been previously reported from 
the state. 
