Sir James Whitley Deans Dundas, the son of Dr James Deans of Calcutta, was born in 1785.
In 1799 Dundas joined the Navy, and by 1841 he had been made a Rear-Admiral. From 1832 Dundas entered into politics, becoming a Liberal MP for Greenwich until 1834, for Devizes from 1836 to 1838 and again for Greenwich from 1841 to 1852. He was appointed Clerk of the Ordnance, listed in the Royal Kalendar as serving from 1839 to 1841, he also sat of the Board of Admiralty, first in 1841 for a number of months and then from 1846 to 1852, during which time he was also the Senior Naval Lord from 1848 to 1852.
He left these appointments to be Commander-in-Chief in the Mediterranean and led a professional campaign during the Crimean War. In 1857 Dundas was promoted to Admiral, but had no further service.
He died in Weymouth in 1862.