An arrangement of diatoms from White Beach, Anglesey. Prepared by Northern Biological Supplies. The slide came was the original paper species list from NBS. This is summarized below, and I have added new name in brackets where I was able to verify them. Diatoms from bottom left to top right;
1. Gomphonema montanum (Gomphonema acuminatum var. montanum)
2. Mastogloia girdle view
3. Mastogloia sp.
4. ??? (I presume this is missing)
5. Epithemia argus
6. Cymbella parva
7. Gomphonema montanum (Gomphonema acuminatum var. montanum)
8. Epithemia argus
9. Rhopalodia gibba
10. Rhopalodia gibberula
11. Navicula ovalis (Diploneis ovalis)
12. Mastogloia lacustris
13. Rhopalodia gibberula
14. Cymbella helvetica
15. Rhapodolia gibberula
16. Grunowia sinuata
Olympus BHB microscope using 450nm LED light. 40x Leitz Pl Apo NA 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 19 images stacked in Zerene (Pmax). I’ve tilted the arrangement to fit everything into one frame with the 40x objective.