Exnacts of the South African nudibraach Lemindn millecra were found to contain the new sesquitezpenes millecroae A (1). millecmne B (2), millecrol A (3), and millecml B (4). Sesquiterpenesl-4 are typical of metabolites found in soft corals and investigation of the digestive gland of L. miNecra revealed the presence of spicules from Alcyo&anfoliafum, A. valdiviae, and Capella rhyrsoidea. L.eminaiz millecra, which is endemic to South Africa, is a translucent white nudibranch with an expanded, blue-edged mantle. Little is known about the biology or diet of this rare nudibranch which was first described in 1985.1 Four specimens of L. millecra were collected at Coffee Bay, Republic of Transkei, in April, 1992. A preliminary tH NMR spectrum of the acetone extract of the animals prompted us to study the chemistry of L. millecra. Our investigation indicated that the interesting 'H NMR signals were associated with the sesquiterpenes millecrone A (1). millecrone B (2), millecrol A (3). and millecrol B (4).