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Show LIST OF CONTENTS. PART III.-1884. May 6, 1884. Page 2. Studies in the Holothuroidea.-III. O n Amphicyclus, a new Genus of Dendrochirotous Holotburians, and its bearing on the Classification of the Family. By Professor F. JEFFREY BELL, M.A., Sec. R.M.S 253 .**». An Account of the Land and Freshwater Mollusca collected during the Voyage of the ' Challenger' from December 1872 to May 1876. By EDGAR A. SMITH. (Plates XXII. & XXIII.) 258 4. Deuxieme liste des Oiseaux recueillis dans l'Ecuadeur occidental par M M . Stolzmann et Siemiradski. Par le Comte H A N S DE BERLEPSCH, C.M.Z.S., et L. TACZANOWSKI, O.M.Z.S. (Plate XXIV.) 281 5. A List of the Rhopalocera collected by Mr. G. French Angas in the Island of Dominica. ByF. D. G O D M A N and O. SALVIN. (Plate XXV.) 314 f>. On a Collection of Heterocera from Dominica. By H E R B E B T DRUCE, F.L.S., F.Z.S. (Plate X X V ) . . 321 May 20, 1884. Mr. W . T. Blanford. Exhibition of, and remarks upon, a series of Heads of Ovis poli .... 326 Mr. R. Bowdler Sharpe. Exhibition of, and remarks upon, a new European Nuthatch (Sitta whiteheadi) 329 Dr. J. G. Garson. Exhibition of a specimen of Lithodes maia, the Northern Stone-Crab •• 329 1. Preliminary Notice of the Isopoda collected during the Voyage of H.M.S. ' Challenger.'- Part I. Serolis. By F R A N K E. BEDDARD, M.A., F.R.S.E., F.G.S., Prosector to the Society 330 2. O n the Mollusca procured during tbe ' Lightning' and ' Porcupine ' Expeditions, 1868- 70. (Part VIII.) By J. G W Y N JEFFREYS, LL.D., F.R.S., F.Z.S. (Plates XXVI.- XXVIII.) 341 3. Studies in the Holothuroidea.-IV. O n the Structural Characters of tbe Cotton-Spinner (Holothuria nigra), and especially of its Cuvierian Organs. By F. JEFFREY BF.LL, M. A., F.Z.S., Professor of Comparative Anatomy in King's College ^ 4. On Races and Hybrids among the Salmonidae.-Part II. By FRANCIS D A Y , F.Z.S ^76 H. On some apparently new Marsupials from Queensland. By R O B E R T COLLETT, C.M.Z.S* (Plates XXIX.-XXXII.) 381 |