Recent reorganisation of the trilobite collections in the Natural History Museum, London UK, led to the discovery of two drawers of specimens from ‘Arctic America’. These fragmentary specimens had remained unincorporated within the systematic trilobite collections. Original labels identified them as the H.W. Feilden Collection from the Arctic Expedition of 1875-6, led by Sir George Nares with HMS Alert and HMS Discovery. Some of the specimens were described but not illustrated by Robert Etheridge in 1878 but his determinations were approximate at best. The early Ordovician trilobites are an important historic collection, as the first collected from so far north. They are re-described and figured here. They have close affinities with species from East Greenland, Svalbard and western USA. A Silurian pygidium from western Greenland is identified as Ekwanoscutellum agmen. All indicate an origination in shallow carbonate facies of Laurentia.

英国伦敦自然历史博物馆最近对三叶虫的收藏进行了重组，结果发现了两个抽屉，来自“北极美国”标本。这些零碎的标本尚未纳入系统的三叶虫收藏中。原始标签将其标识为1875-6年北极探险队的HW Feilden收藏品，由George Nares爵士领导，HMS Alert和HMS Discovery。罗伯特·埃瑟里奇（Robert Etheridge）在1878年对其中的一些标本进行了描述，但未作说明，但他的决定充其量只能算是近似。早期的奥陶纪三叶虫是重要的历史性藏品，是迄今为止北部地区的第一批藏品。它们在这里被重新描述和计算。他们与东格陵兰，斯瓦尔巴特群岛和美国西部的物种有密切的亲缘关系。来自格陵兰西部的志留纪py虫被鉴定为刀cut。所有这些都表明劳伦西亚浅碳酸盐岩相的起源。