The facsimiles presented here incorporate beautiful drawings (including colour lithographs) of many type specimens as well as early observations of sexual reproduction.
These valuable resources are accessible in three ways:  

• Database of individual images by taxon
  Search or browse the database - includes high resolution images for download.


• Entire plates
  by publication, for the following authors:


Donkin, A.S.
Gregory, W.
Greville, R.K.
Norman, G.
Ralfs, J.
Roper, F.C.S.
Smith, W.

Click here for technical notes and interactive scale bars.

W. Smith's British Diatomaceae by genus - the plates in this extensive work typically contain one or a few genera each.