These three .pdf’s are the the work of David V.P. Conway and were published by the Marine Biological Association of Great Britain in 2012. Many of the species described will be found all around the European continent including in the Mediterranean Sea, no doubt across the North Atlantic too. There’s a pictorial guide at the beginning of each .pdf which lets you know which .pdf to look in. I’ve found it very useful as I had no previous knowledge of these strange microscopic organisms.
These are direct download links, they are between 15mb and 25mb each.
http://plymsea.ac.uk/id/eprint/6360/1/Z ... e%2027.pdf
Here are links to articles for your reading pleasure. You may also submit brief reviews or discuss the contents of the articles.