Dana was a biologist first, then becoming one of America's premier geologists. His Manual of Geology is still in print after 150 years. He was a biologist/geologist on the U.S. Exploring Expedition (1838-1842), no doubt the reason he has plant collections recorded in Australia. He was for many years Professor of Natural History at Yale University.
The attached portrait is from Pirsson, Louis V. 1919. "Biographical
Memoir of James Dwight Dana 1813-1895."
National Academy of Sciences Biographical Memoirs 9: 39-92, portrait.
Source: pers com, email, David M. Damkaer (Monroe,