Having attended a course of lectures in Stockholm by Sven Lovén, he became interested in the zoology of the Baltic, and published several papers on the invertebrate fauna, and subsequently on the fishes.

[1] His leisure was devoted to researches on the fossils of the Silurian rocks of Gotland, including the corals, brachiopods, gastropods including pteropods, cephalopods and Crustacea.

He described also remains of the fish Cyathaspis from Wenlock Beds in Gotland, with Tamerlan Thorell, a scorpion Palaeaphonus from Ludlow Beds at Wisby.

[1] He was awarded the Murchison Medal by the Geological Society of London in 1895.

[1] In 1876 he was appointed professor and keeper of the Paleozoological department of the Swedish Museum of Natural History in Stockholm, where he died in 1901.