M. E.  Rice, ?Observations on the development of six species of Caribbean Sipuncula with a review of development in the phylum?, in Proceedings of the International Symposium of Sipuncula and Echiura, M. E.  Rice and Todorovic, M., Eds. Belgrade: Naucno Delo Press, 1975, pp. 141-160.

M. E.  Rice, ?Survey of the Sipuncula of the coral and beach rock communities of the Caribbean Sea?, in Proceedings of the International Symposium of Sipuncula and Echiura, M. E.  Rice and Todorovic, M., Eds. Belgrade: Naucno Delo Press, 1975, pp. 35-49.