Note
Evidence from in vitro culture of embryos and larvae of Parastichopuscalifornicus (Stimpson) suggests that asynchronization of development through metamorphosis and settlement results in a variable pelagic period for larvae within a particular cohort. Additionally, considerable variation in size of 0 + yr recruits observed in situ may indicate that settlement had occurred continuously for some months within the population studied. Recruitment of at least seven species of echinoderms (including P. californicus) was observed at distinct sites that were notably free of the predatory sea stars Solaster dawsoni (Verrill), S. stimpsoni (Verrill), and S. endeca (L.).