OBSERVATIONS ON THE PROTOZOA. 
WITH DESCRIPTIONS AND DRAWINGS OF SOME 
PROBABLE NEW SPECIES. 
CLEMENTINA S. SPENCER. 
In 1906 The Davenport Academy of Sciences published a 
thesis by Dr. C. H. Edmondson on the Protozoa of Iowa which 
is the best list, so far compiled, of the protozoa known to occur 
in the waters of this state. During my recent observations of 
these always interesting organisms I have found a number of 
species which may be considered an addition to Edmondson’s 
list, including some forms Avhich further observation may 
prove to be new. With the list of these are included some notes 
on more common forms . which may be of interest to students 
of protozoology. 
The classification which I follow is that of Professor Calkins in 
his Protozoology (1909), with the exception of a single group 
which follows the Euglenoidina of Ohio, by Professor L. B. Wal- 
ton (1915). Those species marked with an asterisk are an addi- 
tion to Edmondson’s list, while those unmarked are included 
for other reasons. Unless specified, the forms were all found 
near the State University of Iowa during the year 1915-1916. 
Subphylum SARC'OMNA 
Class I Rhizopoda 
Subclass PROTEOMYXA 
Vampyrella spirogyrae Cienk. 1 and 2, figure 53. 
Body nearly globular, pseud op-odia raylike, moving with the 
amoeboid motion of the hyaline periphery. Endoplasm densely 
and brilliantly orange red, finely granular with a few darker 
pigment (?) granules. Within a few moments the animal 
changes from having nearly all capitate pseudopodia to nearly 
all simple rays. Capitate pseudopodia are shot in and out very 
rapidly. Both kinds may be withdrawn from a considerable 
portion of the periphery and short amoeboid lobes occasionally 
appear. Nucleus and vacuoles not visible. Motion a swimming 
glide. Diameter of body in red specimen 1 microns. 
Formerly this organism was classified with the Heliozoa, but 
both Calkins and Doflein now place it in the Proteomyxa on the 
