84 Linnean Society. [May 24, 



Sir David James Hamilton Dickson, Knt., M.D., F.R.S.Ed. -Sc, 

 was the youngest son of the Rev. George Dickson, Minister of Bedrule 

 in Roxburghshire. He entered the Navy as Surgeon's Mate in 1795, 

 was promoted to the rank of Surgeon in 1798, and to that of Phy- 

 sician of the West India Fleet in 1806. In 1813 he was superin- 

 tending Physician of the Russian Fleet then lying in the Medway, 

 and afterwards received the order of St. Wladimir from the Emperor 

 Alexander in acknowledgement of his services. His public services 

 in the British Navy were in various climates ; and he accompanied 

 the expeditions to Holland in 1799 and to Egypt in 1801, and waa 

 present at the capture of the French and Danish islands in the West 

 Indies, and in the expedition to the Chesapeake, New Orleans, &c. 

 He was appointed Physician of Plymouth Hospital in 1824, and in 

 1 840 his designation was changed to Inspector of Hospitals, that of 

 Physician having been abolished in the naval service by order in 

 Council. He published various professional papers in the medical 

 journals, was knighted in 1834, and died at Stonehouse on the 2nd 

 of January, in the 70th year of his age, having been elected'into the 

 Linnean Society in 1816. 



Edward Doubleday, Esq., was descended from a respectable 

 Quaker family long resident at Epping, and was born on the 9th of 

 October 1810. In common with his brother Henry he early at- 

 tached himself to the study of Natural History, to which he became 

 wholly devoted. In 1832 he commenced a series of contributions 

 to the • Entomological Magazine,' in which, during the six following 

 years, he published a great variety of notes and memoirs on ento- 

 mological subjects. In 1837, in company with Mr. Foster, also a 

 member of the Society of Friends, he took a voyage to America, and 

 visited, in the course of a tour of nearly two years, almost all the 

 States of the American Union. His communications to the ' Ento- 

 mological Magazine ' during this period bear date from Trenton 

 Falls, Philadelphia, Louisville, Shawnee Town, from which he as- 

 cended the Mississippi to Pera, proceeding thence to Chiago on 

 Lake Michigan, and by steamer across the Lakes of Michigan, 

 Huron, St. Clair and Erie to Niagara, whence he returned to 

 Trenton Falls, and then proceeded south to New York, Baltimore, 

 Washington, Charlestown, Jacksonville, St. John's Bluff, Savannah, 

 Eind the Warm Springs of North Carolina. His collections, which 

 were very extensive, and consisted chiefly of insects, but were by no 

 means limited to that class, were most liberally distributed by him 

 after his return to England. He subsequently applied for permission 

 to accompany the ill-fated expedition to the Niger, from which. 



