Name
- Thunberg, Carl Pehr, Swedish Botanist1
- Thwaites, G- H- K-, Director of the Botanic Gardens at Kandy1
- Torrey, John, Dr1
- Trinius, Charles Bernard, of St. Petersburg1
- Turner, Dawson, of Add MS 321661
- Valentine, William, of Add MS 324411
- Vallejo, Mariano1
- Viviani, Domenico, Professor, of Genoa1
- Vyvyan, Richard Rawlinson, 8th Baronet1
- Walker, John, DD; Professor of Natural History in the University of Edinburgh1
- Westwood, John Obadiah, entomologist and palaeographer1
- Whewell, William, Reverend Master of Trinity College Cambridge, natural philosopher, 1794-18661
- Willoughby, Henry, 6th Baron Middleton1
- Wills, James, of Jamaica1
- Winch, Nathanael John1
- Yates, James, of Add MS 324411