YARROW, Henry Crecy, physician, born in Philadelphia, Pennsylvania, 19 November, 1840. He studied in Pennsylvania and in Switzerland and was graduated at the medical department of the University of Pennsylvania in 1861. During the civil war he served as assistant surgeon in the 5th Pennsylvania cavalry, and subsequently he was surgeon and naturalist to the expedition for the exploration of the territory west of the 100th meridian, under Lieutenant George M. Wheeler, of the United States engineers. Dr. Yarrow is a member of the faculty of the medical department of the Columbian university, and is curator of the department of reptiles in the United States National museum in Washington, D.C. He is a member of the Philosophical, Anthropological, Biological, and Geographical societies of Washington, and of other scientific bodies in this country and abroad, to whose proceedings he has contributed papers. Dr. Yarrow was associated with Dr. Elliott Coues in the publication of various papers on the natural history of North Carolina, his latest work giving the results of his experiments with serpent-venom and so-called antidotes. His writings include articles in the annual volumes of the United States National museum and the Bureau of ethnology; in part, vol. v., on "Zoology," of the "Report upon Geographical and Geological Explorations and Surveys west of the 100th Meridian" (Washington, 1875)" and "Study of the Mortuary Customs of the North American Indians" (1881)" also the article on venomous serpents in "Handbook of the Medical Sciences" (New York, 1888).