1. Bailey, R. S.: The population biology of blue whiting in the North Atlantic. Adv. mar. Biol. (In press)
2. Baker, A. C., M. R. Clarke and R. J. Harris: The N.I.O. combination net (RMT1+8) and further developments of rectangular midwater trawls. J. mar. biol. Ass. U.K. 53, 167?184 (1973)
3. Bouchet, P.: Mise en évidence de stades larvaires planktoniques chez des gastéropodes prosobranches des étages bathyal et abyssal. Bull. Mus. natn. Hist. nat., Paris (Sect. Zool., fasc. 277) 400, 947?972 (1976)
4. Crisp, D. J.: Energy relations of marine invertebrate larvae. Thalassia jugosl, 10, 103?120 (1974)
5. Dietrich, G.: Atlas of the hydrography of the northern North Atlantic Ocean, 140 pp. Charlottenlund, Denmark: Conseil International pour l'Exploration de la Mer, Service Hydrographique 1969