The best way to find the cells is to google images and have sketch or diagram in the search bar.
example; "euglena sketch"

This is a great example of a euglena cell- you will be able to find similar sketches for a cell types.
Great Protist overview:
http://www.google.com/imgres?imgurl=https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgt1Z726RjXtAh7MEql2PGDX37nW6XJ9LU3pWWw8-oZK-J8whlXKKudfFPcDz6vWQTzgyXwVDXJxnh9480sH9jESZY1hlLi0G2iAIw9KRuvc4VCAfm61hdG9oY9YPOLvZG6LPmX7pJzY0YI/s1600/euglena+labeled.jpg&imgrefurl=http://homeschoolersresources.blogspot.com/2010/09/biology-module-3-kingdom-protista.html&usg=__uDIot0-QQyjAuMOhk3mjr8SJGrQ=&h=457&w=340&sz=30&hl=en&start=20&zoom=1&tbnid=LUptHivQ1iy8qM:&tbnh=128&tbnw=95&ei=WZxLT4O_M8mutweB0rTvAg&prev=/images%3Fq%3Deuglena%2Bsketch%26hl%3Den%26safe%3Dactive%26sa%3DG%26gbv%3D2%26tbm%3Disch&itbs=1
or just pix
http://www.microscopy-uk.org.uk/micropolitan/fresh/protozoa/index.html