Note 12 — Chapter IV · ON THE FORMATIONS OF THE PAMPAS.
Reading edition
“Monatsberichten der könig. Akad. zu Berlin,” April 1845. The list consists of:— POLYGASTRICA. Campylodiscus clypeus. Coscinodiscus subtilis. Coscinodiscus al. sp. Eunotia. Gallionella granulata. Himantidium gracile. Pinnularia borealis.