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Show 134 MR. P. L. SCLATER ON TWO CURIOUS DUCKS. [Feb. 7, inner margins not meeting. Anterior femora armed with three strong spines beneath. Long. 22 millim.; exp. tegm. 63 millim. Hab Ponape (Caroline archipelago). (Mus. Godeffroy ; coll. Dist.) EXPLANATION OF PLATE VII. Fig. 1, la, lb. Arcystasia godeffroyi, p. 133. 2, 2a, 2b. Cosmopsaltria stuarti, p. 125. 3, 3a, 3b. Tibicen burkei, p. 126. 4, 4a, 4b. willsi, p. 127. 5, 5a, 56. Melampsalta leichardti, p. 132. 6, 6a, 66. Tibicen muelleri, p. 128. 7, 7a, 7b. gregoryi, p. 129. 8, 8«, 8b. gilmorei, p. 127. 9, 9a, 9b. Melampsalta warburtoni, p. 129. 10, 10a, 106. forresti, p. 129. 11, 11a, 116. Cystosoma schmeltzi, p. 132. 12, 12a, 126. Melampsalta eyrei, p. 130. 13, 13a, 136. macMnlayi, p. 130. 14, 14a, 146. landsboroughi, p. 131. February 7, 1882. Prof. W. H. Flower, LL.D., F.R.S., President, in the Chair. Mr. Henry Seebohm exhibited a series of intermediate forms between Carduelis caniceps and C. major (the eastern form of our common Goldfinch, C. elegans), obtained at Krasnoyarsk in Central Siberia. The series showed every intermediate form between one species and the other, the white on the outer webs of the innermost secondaries increasing in exact proportion as the black on the crown and nape diminished. The supposition was that the two forms interbreed in this district and produce fertile offspring. Mr. Sclater exhibited on behalf of Mr. Peter Inchbald, F.Z.S., two curious Ducks which had been shot on some ornamental water near Darlington in the county of Durham. One of these appeared to be the result of a cross between the Pochard (Fuligula ferina) and one of the freshwater Ducks, possibly the Teal or Mallard ; the other presented nearly the appearance of a female Scoter (CEdemia nigra), but was rather darker below. The following papers were read :- |