There appears to have been sufficient progress made in the experimental work on the artificial propagation of the diamond-back terrapin, Alalaclemmys centrata, at the United States Fisheries Biological Station, Beaufort, N. C, since 1915 to warrant the drawing up of a report covering such information on this subject as has been collected to date and has remained unpublished. In Economic Circular No. 5, revised, of the U. S. Bureau of Fisheries,' the results of observations up to and including 19 15 are cited with methods outlined for construction of pens, selection of brood stock, care of eggs, young, and adults, and some notes on the growth of the terrapins. Much information has been collected since that time by continuing observations on many of the same terrapins considered in the 19 17 report and also through further studies with dififerent purposes begun in more recent years. ' Hay, W. P.: Artificial Propaeation of the Diamoad-Back Terrapin. Economic Circular No. 5. revised. U. S. Bureau of Fisheries, Washington, 191;. 91 92 BULLETIN OF THE BUREAU OF FISHERIES.The terrapin propagation study has been directed since its beginning by several investigators.Originally Dr. R. E. Coker gave his attention to its possibilities and prepared a report of his results for the North Carolina Geological and Economic Survey. ' 19. 4 '21.3
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