Name
- Carpenter, William Benjamin, naturalist1
- Carruthers, William, Keeper of Botany British Museum1
- Cauchy, Philippe Francois, geologist1
- Charlesworth, Edward, geologist1
- Christison, Robert, 1st Baronet, toxicologist1
- Clark, Andrew, 1st Baronet, of Cavendish Square, physician, 1826-18931
- Clarke, Charles Baron, FRS; botanist1
- Clarke, John Mason, American geologist1
- Clarke, William Branwhite, geologist1
- Clarke, William Eagle, naturalist1
- Clift, William Home, naturalist; son of William Clift1
- Clift, William, naturalist1
- Cole, William Willoughby, 3rd Earl of Enniskillen1
- Conybeare, William Daniel, geologist, Dean of Llandaff1
- Corfield, William Henry, Professor of Hygiene and Public Health, London University1
- Cramer, Carl Edward, Swiss botanist1
- Craufurd, John, orientalist1
- Crouch, Walter1
- Cunnington, William, antiquary, 1754-18101
- Dahlgren, Erik Wilhelm, librarian of the Royal Swedish Academy, Stockholm, 1848?-19341