1. Thompson, J.E., unpublished observations.
2. Unreported data from these laboratories.
3. Ristau, D.A., Proc. biol. Soc. Wash.91 (1978) 569. The nameToxadocia does not imply toxicity but refers to the fact that the sponge has only toxas as microscleres.
4. Burma, O.P., Analytica chim. Acta9 (1953) 513.
5. Kalvoda, J., Hensler, K., Ueberwasser, H., Anner, G., and Wettstein, A., Helv. chim. Acta96 (1963) 1361.