Antique Diatom Microscope Slide. Pleurosigma Test Slide. By Watson.

Antique Trio Of Diatom Microscope Slides. Parasitic Diatoms On Algae. By McGann.

Vintage Microscope Slide Diatom. Auliscus Omaruensis by R.H.Taylor

Vintage Microscope Slide Diatom. Triceratium Favus. by R.H.Taylor

Antique microscope slide. A.C.Cole. Diatom. Amphitetras elegans. Extremely rare.

Vintage Microscope Slide Diatom. Aulacodiscus Omaruensis by R.H.Taylor

Vintage Microscope Slide of an Unidentified Diatom from Conset, Barbados

Vintage Microscope Slide Diatom. Navicula Pleurosigna by R.H.Taylor