1. Abd El-Kerim, H.M., 1988. Detailed studies on the hermaphroditc reproductive system of the desert snail Eremina ehrenbergi Roth (1839), to determine the male tract and its role in the formation of the spermatophores (Gastropoda—Stylommatophora). M.Sc. thesis, Faculty of Science, Alexandria university.
2. Abdel Messeih, M.K., 1982. Studies on ascidians in Alexandria. M.Sc. thesis, Ibid, pp.
3. Abdel Messeih, M.K., 1994. Taxonomical studies on ascidians in the Egyptian Mediterranean waters and the Sues Canal. Ph.D. thesis, Ibid, pp.
4. The chemical constituents of the yolk formed during deutoplasmogenesis in the crab Portunus pelagicus (L.) (Crustacea – Brachyura);Bawab;Bull. Fac. Sci. Alex. Univ.,1987
5. Cyclic changes in the histological structure of the ovaries of Portunus pelagicus (L.);Bawab;Egypt. J. Histol.,1987