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x .—'Alpine Orchids adapted to Cross-fertilisation by Butterflies.'—Nature, Dec. 31, 1874.

.—'Ulteriori Osservazioni sulla Dicogamia nel Regno vegetale.' Parte seconda, fasc. ii. Milan, 1875, pp. 149, 150.

J.—'British Wild Flowers.' London, 1875, pp. 162–175.

, E. D.—'Australian Orchids.' Part I. 1875, Part II. 1876. Sydney, New South Wales.