July 25-1921 Monday Spent the day at Harrow looking at British hackifords of the Helder collection. The Noni[illegible]ssian is the great rarity of the collection and has the finest material. A wonderful array of Dictyrella, [illegible], Merista, Meristella, Eospiina, Altpa, Rhynchopira, and Beachia like form (T. onelonica) While there are forms reminding at once of New Scotland yet upon the whole the fauna is a different one and a subprovince of the Arctic Helderfuran. Anastrophia is native. The hackifords were marked F for thank I think some are from these Hackell limestones. Of G [illegible] in my little, and J H mother. Of the Silurian many forms are suggestive of the Noni[illegible]ssian and for this reason Barance (he) identifies species of the two formations. Most of these if at all will prove to be different species. In the Silurian we see no Partamorus flavus. Rhynchotreta cuneata is here but as