1. C.192.c.1, 1(19) Reference (shelfmark): C.192.c.1, 1(19) Title: Halidrys siliquosa β minor. Photographer: Atkins, Anna Scope & Content: Genre: Scientific Photography Cyanotype negative photogram of two algae specimens, on unwatermarked paper. Collection Area: Printed Collections Languages: Not applicable Date Range: 1843-1853 Extent: 1 item