The postlarval phase is an essential period in the life history of marine invertebrates; vulnerable to high mortality, it ultimately influences the distribution and abundance of adult populations. In the deep NE Atlantic, a large number of postlarval

The developmental series from initial post-larval to more mature stages of brittlestars are figured for four species occurring in the shallow and/or deep waters of the Atlantic. These are: Ophiomisidium speciosum Koehler; Anthophiura ingolfi Fasmer; Ophiura

Sequential growth stages of Ophiura ljungmani Lyman, Ophiomusium lymani Wyv. Thomson, Amphiophiura bullata Wyv. Thomson and Amphilepis ingolfiana Mortensen, are described and figured, based on specimens obtained from depths between 1330 to 3834 m, in