1. 1958
2. A Study in the Experimental Taxonomy of some British Sphagha (section Cuspidata),with observations of their ecology.

   Awdur: Agnew, S., 5 Mai 1958

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

3. 1959
4. Calcareous algae of the silurian of the Welsh border

   Awdur: Green, H., Ebr 1959

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

5. 1963
6. An ecological study of Chaetogaster limnaei( von Baer)

   Awdur: Gruffydd, L. D., Ebr 1963

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

7. 1965
8. Comparative studies in the pathology of radiomimetic conditions

   Awdur: Mason, J., Medi 1965

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

9. 1966
10. Studies on the nutrition and feeding of the larvae of the large cabbage white butterfly, Pieris brassicae L.

    Awdur: Akhtar, M., 1966

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

11. Studies on fossil plants of Karoo age from Central & Southern Africa

    Awdur: Williams, P., Ion 1966

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

12. The genetics and evolution of differences between closely adjacent plant populations, with special reference to heavy metal tolerance

    Awdur: Antonovics, J., Ion 1966

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

13. Studies on plant microfossils from the Carboniferous of North Wales

    Awdur: Hibbert, F. A., Ebr 1966

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

14. Studies in the flora of the Rhynie chert

    Awdur: Saadawy, W. E., Meh 1966

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

15. 1968
16. A comparative study of morphology, behaviour and ecology of Chaetogaster Limnaei ( von Baer) from several host species

    Awdur: Buse, A., Medi 1968

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth