| The Trilobite Family Olenidae |
| The Trilobite Family Olenidae - with description of Norwegian Material an remarks on the Olenid and Tremadocian Series, with 19 Figures in the text and 31 Plates, Oslo 1957 |
| Peltura westergaardi HENNINGSMOEN 1957, Beschreibung S. 239; Abb. P.7, P. 25, Fig. 8,10,12,15-17 |
| Peltura acutidens Brögger, 1882, Beschreibung Seite 233; Pl. 25, 1,3,4,7,9,11 |
| Protopeltura planicauda (Brøgger, 1882), P. 228; Pl. 24,11-13 |