34G 
IOWA ACADEMY OP SCIENCE Vol. XXIV, 1917 
* H aemato coccus lacustris Girod. 44 to 46, figure 56. 
Body field by delicate threads in a large lorica. Chromato- 
phores green, often wholly or partly red. Stigma present, flag- 
ella two. Nucleus central, irregular. In the free swimming 
stage the body is pyriform, with a rather pointed anterior end. 
Chromatophores rounded and numerous. Cyst or shell oval in 
free swimming stage, spherical in resting phase. Proximal ends 
of flagella stout. Size 30 to 45 microns. 
In the late autumn these forms were discovered in an old 
geode in a city garden. Most of the cells were in a resting stage, 
and all were more or less red. A culture was brought into the 
laboratory and various conditions of warmth, light, and fresh 
rain water were supplied in the effort to force activity; but it 
was toward the end of a cold’ May before the encysted forms 
revived out of doors, and those indoors never revived. Binary 
fission and multiple division within the cyst were observed in 
the spring. At this time the red color was much reduced and 
it was possible to see definite stigmata. The red color of the 
protoplasm is due to the change in color of the chloroleucites, 
and is not concerned with the stigmata. This form is claimed 
by both botanists and zoologists. 
# Two unknown chlorophyl — and stigma — bearing flagellates. 
47, figure 56. 
A minute free swimming form, not metabolic while under ob- 
servation, yet delicate and plastic in appearance. Color very 
faint light greenish blue. One large anterior median stigma, 
and two equal divergent flagella longer than the body. Pos- 
terior part of the body drawn out into two short tail-like 
processes. A large clear central body of undetermined nature. 
Length of body 15 microns. 
Professor Walton says of this: “This is something quite 
new to me. I wish very much that I could examine a living 
specimen, undoubtedly an impossibility unless you obtained a 
culture. I suspect it may belong to the order Chrysomona- 
dinese . 9 ■ 
48, figure 56. 
Body pear or bell shaped, apparently enclosed by a firm, clear 
pellicle or lorica. The posterior end is either concave or has 
a clear space between the endoplasm and the pellicle, giving 
the effect of a concavity. Endoplasm clear bright green 
