Noted biologist and professor of natural history at Harvard, where he founded a museum of comparative zoology. Original vintage sepia 4.25 x 6.5 cabinet photo by A. Sonrel of Boston, showing Agassiz looking over a book and seated next to a table with a microscope and large starfish, signed in the lower border in fountain pen “L. Agassiz.” In fine condition, with light creasing to three corners and a few mounting remnants on reverse. COA John Reznikoff/PSA/DNA and R&R COA.