The diatoms presented here were all collected in Central Texas with the exception of a few taken from Washington State in the vicinity of the Olympian Peninsula. All were mounted in naphrax. If anyone is interested in how to mount and study diatoms, I will add a section discussing the procedure that I use which is just one of many methods. For the best study, special lenses and condensers are helpful, along with the best literature sources. These will also be included.