The following biographical sketch of Thomas Bridges was read by Mr. Dall.

Memorial Sketch of Thomas Bridges, Esq., F.L.S., F.Z.S., and Member of the Cala. Acad. Sci.

BY W. H. DALL, ACTING DIRECTOR SCI. CORPS, W. U. T. EX.

Mr. Bridges was born at Lilly in Hertfordshire, England, on the twenty-second of May, 1807.

At an early age he became interested in Natural History, and when about nineteen or twenty—having previously studied for some three years under Sir William Hooker, at Kew Gardens—he sailed for Valparaiso. He remained here or passed the time in some of the adjoining provinces, from 1827 to 1844, when he returned to England on a short visit. On again reaching South America, he undertook the explorations in Bolivia, so well known to naturalists, through their magnificent results. During the course of this journey, in June, 1845, he discovered and obtained seeds of the great South American Water Lily, the Victoria Regia, Lindley. Although the plant had previously been detected, to Mr. Bridges belonged the honor of first introducing it into the old world, by transporting seeds which subsequently germinated at Kew.

In 1846, he returned to England, where for many months he was prostrated by severe illness contracted in his arduous explorations.

In 1847, he was married to Miss Mary Benson, of Bristol, England, a niece of the eminent collector, the late Hugh Cuming. Soon after he proceeded again to Valparaiso.

In 1851, he visited and explored the island of Juan Fernandez.

In the report of Lieut. Herndon, U. S. N., on his explorations of the Amazon, he acknowledges his obligations to Mr. Bridges, for invaluable information furnished, in regard to the head-waters of that river.

In 1855, he proceeded to Panama, remaining there some six months; and from thence to England, subsequently to France, and finally to California, where he arrived in November, 1856.