London: John Murray, 1876. Hardcover. 1st Edition. viii,482pp. Octavo. Original green blind stamped cloth. Gilt title on spine. Top edge untrimmed. Coated brown endpapers. Armorial bookplate on front paste down. Errata slip. Tables in text. A touch of very light wear otherwise a very attractive bright copy. Freeman 1249. A survey of the nature of the mechanisms favouring cross fertilisation and the advantages to be gained by it. 1876