D.  H Thomas, ?Jurassic corals and Hydrozoa, together with a re-description of Astrea caryophylloides Goldfuss?, Geology and Palaeontology of British Somaliland, vol. 2, pp. 23 - 39, pl. 2-5, 1935.

D.  H Thomas, ?On some sponges and a coral of Upper Cretaceous age from Toco Bay, Trinidad?, Geological Magazine, vol. 72, pp. 175 - 179, pl. 5-6, 1935.

D.  H Thomas, ?On Tricycloseris, Anabacia, and some new genera of Hexacoralla?, Geological Magazine, vol. 72, pp. 424 - 430, 1935.

D.  H Thomas and Omara, S., ?The Cenomanian compound coral, Aspidiscus cristatus (Lamarck), from Nezzazat, Western Sinai?, Geological Magazine, vol. 94, no. 2, pp. 151 - 155, pl. 4-5, 1957.