CONTENTS 



Introduction 1 



Materials and methods 1 



Bathymetry 2 



Geology 2 



Sampling gear 2 



Data treatment 2 



Bottom sediments 2 



Distribution of Class Bivalvia 2 



Systematic arrangement 3 



Distributional and ecological discussion 3 



Class Bivalvia 3 



Subclass Palaeotoxodonta 3 



Order Nuculoida 3 



Family Nuculidae 3 



Genus Nucula 3 



Nucula delphinodonta 3 



Nucula proxima 3 



Nucula tenuis 4 



Nucula sp , 4 



Family Malletiidae 5 



Genus Malletia 5 



Malletia obtusa 5 



Genus Saturnia 5 



Saturnia subovata 5 



Family Nuculanidae 5 



Genus Nuculana 5 



Nuculana acuta 5 



Nuculana carpenteri 6 



Nuculana caudata 6 



Nuculana pernula 6 



Nuculana tenuisulcata 6 



Nuculana sp 7 



Genus Yoldia 7 



Yoldia limatula 7 



Yoldia myalis 7 



Yoldia regularis 8 



Yoldia sapotilla 8 



Yoldia thraciaeformis 8 



Yoldia sp 9 



Genus Portlandia 9 



Portlandia fraterna 9 



Portlandia frigida 9 



Portlandia inconspicua 9 



Portlandia inflata 10 



Portlandia iris 10 



Portlandia lenticula 10 



Portlandia lucida 10 



Portlandia minuscula 11 



Subclass Cryptodonta 1 



Order Solemyoida 1 



Family Solemyacidae 1 



Genus Solemya 1 



Solemya borealis 1 



Solemya velum 1 



Subclass Pteriomorphia 1 



Order Arcoida 1 



Family Arcidae 1 



Genus Anadara 12 



Anadara ovalis 12 



Anadara transversa 12 



in 



