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Show 1871.] MR. A. MURRAY ON THE STERLET. 11 down her horn against the bars of her cage ; for it is only within the last tew years that this appendage has grown into its present shape. But it is obvious that nearly similar circumstances might occur in a state of nature, and that the horn thus developed would suffice for the foundation of a new species equally well with those already referred to." The following papers were read :- 1. Note regarding the Young Stage of the Sterlet (Acipenser ruthenus). By A N D R E W M U R R A Y , F.L.S. [Received December 16, 1870.] During the last summer I made an attempt to introduce the Sterlet from Russia into Britain by importing artificially impregnated ova, which was so far successful that I turned loose, in the Duke of Sutherland's river Fleet, from 150 to 200 lively young Sterlets which had come out on the voyage. I gave an account of m y proceedings in two papers which appeared lately in 'The Field,' and to these I would refer any one who desires information regarding the practical part of the business. In the course of the experiment, however, two scientific observations were made which seem worthy |