Silhouette Images Contributed by Martin R. Smith

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20 silhouette images in all.

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Aysheaia pedunculataOttoia tricuspidaHaplophrentis carinatusMicrodictyonFomitchella (acinaciformis)Treptichnus pedumMitrocystella incipiensCtenoimbricata spinosaKinzercystis durhamiHelicocystis moroccoensisCamptostroma roddyiRhenocystis latipedunculataPonticulocarpus robisoniKinzercystis durhamiCastericystis valiUbaghsicystisVetulicolaHelicocystis moroccoensisVetulocystis catenataCricocosmia