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A description of the laboratory rearing of Parechinus angulosus (Leske) larvae is given. The larvae are described from samples taken at intervals during the larval life history. At 15°C in the presence of autotrophic flagellates and diatoms as food, larval metamorphosis occurred 56 days after fertilization. Metamorphosis could be delayed at least eleven days in the absence of a suitable substrate.
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