The breeding habits of this asterid have been noted by M. Sars, who has described the external features of the developmental stages. He observed the peculiar habit of ‘brooding.’ In the spring of 1840 he found several of the parents at very low-tide-mark fixed to stones in their brooding position. The species he examined is described as Echinaster sanguinolentus, and is apparently the same species, though he speaks of the ‘blood-red’ embryo, whereas my specimens were a light orange. They conform exactly to the tint of the oral surface of the parent. The time of breeding of Cribrella oculata at St Andrews appears to extend from February to April inclusive, and throughout this period the parents are found fairly plentifully, adhering to the under surface of rocks, nursing the masses of eggs or young under their bodies. This habit of protecting its young is also pursued by an allied species, Asterias mütteri, which is equally abundant in the same locality, but the breeding of which is effected earlier, i.e., in November and December. I hope to proceed with the study of this species in the near future.