S2 DR. G. S. BRADY ON FRESHWATER [Feb. 2, accompany any other gulls ; Mr. Williams indeed did not take it for a gull at all. The date of its capture was not noted ; it came into Mr. Thompson's hands November 1st, 1884, and had been then some days dead. It was therefore probably shot at the beginning of the last week in October. The sex was not ascertained. Mr. Henry Seebohm exhibited a fully adult male of Ross's Gull (Larus rossi) which had been shot on the 15th of June, 188.5, in the neighbourhood of Christianshaab on the south shore of Disco Bay in Greenland, about latitude 69°. It was shot at the nest, and both bird and egg were sent by Mr. Paul Miiller to Copenhagen. The egg is of exactly the same character as that of Sabine's G\A\ {Larus sabinii), but is rather larger, measuring T 9 by TS inch. Mr. Seebohm exhibited a coloured photograph of the egg, which has never been obtained before. The bird is so rare that the British Museum does not possess an example, though there is one in Edinburgh and one in Liverpool, from Melville Peninsula, and one in Cambridge, besides three in Copenhagen, the last four from Disco Bay. In the fully adult breeding bird the delicate salmon-coloiir of the head, rump, and under-parts, contrasting with the black ring round the neck, make it an exceptionally beautiful object. The bill is black, the legs and feet coral-red with black nails, and the orbits deep orange or pale Termilion. A communication was read from Prof. R. Collett, C.M.Z.S., con-taining an account of the external characters of the Northern Fin-whale (Balcenoptera borealis). This memoir had been based upon the examination of numerous specimens of this Whale killed on the coast of Norway during the past summer. This paper will be published, with illustrations, in the Society's ' Transactions.' The following papers were read : — 1. Notes on Freshwater Entomostraca from South Aus-tralia. By George Stewardson Brady, M.D., F.R.S., F.L.S., Professor of Natural History in the Durham College of Science, Newcastle-upon-Tyne. [Received January 5, 1886.] (Plates VIII.-X.) The Entomostraca here described were collected by Professor Ralph Tate, of the University of Adelaide, South Australia, and by Mr. T. Steel. Prof. Tate's specimens were sent by him to Prof. T. Rupert Jones, F.R.S., to whose kindness I am indebted for the
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