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Rh Edwards, Mr., plants collected by him in Melville Island, 185, 194

Ehrenberg, C. G., his account of the structure of the pollen masses in Asclepiadeæ, 521, 522 note; his further observations on the sexual organs of, 542-3

Elæagneæ, how distinguished from Proteaceæ, 82

Elæis, monœcious and not diœcious, 140; situation of the foramina in its putamen, 140; its remarkable geographical distribution, 141; undoubtedly indigenous to the whole of the West Coast of Africa, 161

Embryo, on the plurality and development of, in the seeds of Coniferæ, 565—575

Epacrideæ, observations on the order and on its distribution in Terra Australis, 38; hardly exists in the interior, 339

Ephedra has a naked ovulum, 453; structure of the nucleus in, 455

Epistephium, M. Achille Richard's ideas of the structure of an Orchideous flower derived from, 501, 561

Eremophila, observations on the genus and its species, 332-3; characteristic of the vegetation of the interior of N. Holland, 339

Erythrophleum, observations on the genus, 111, 153, 290, 291

Erythrospermum, its affinities, 121

Eucalyptus, reason why the species forms one of the most striking features in the vegetation of Terra Australis, 18, 62, 317; origin of the operculum, 75; species found by Mr. Fraser at Swan River, 311; species found in the interior of New Holland, 339

Eudesmia, its relation to Eucalyptus, 75

Eugenia, species of, in which the integument of the seed is absorbed before its separation from the parent plant, 364

Euonymus, resupination of its ovula, 448-9

Euphorbia, the author's view of the structure of the genus, 28; a frutescent species with cylindrical stem and branches, observed in the vicinity of the Congo, 128

Euphorbiaceæ, observations on the order, and on its distribution in Terra Australis, 28; on the species found in the vicinity of the Congo, 127; the double stigmata of many species of, 559

Eupomatia, how shown to belong to Anonaceæ, 74

Farsetia, character of the genus and observations on its structure, especially as regards its dissepiment, 269

Fecundation, observations on the organs and mode of, in Orchideæ and Asclepiadeæ, 487—543; supplementary observations on 545—551; various opinions on the subject, in Orchideæ, 490-8; in Asclepiadeæ, 516—521; as held in Orchideæ by Haller, Adanson, 490, Curtis, C. K. Sprengel, Wachter, Schkuhr, Swartz, 491; Salisbury, L. C. Treviranus, Ad. Brongniart, Linnaeus, Schmidel, 402; Koelreuter, Jonathan Stokes, Batsch, L. C. Richard, 493; du Petit Thouars, 494; Link, Lindley, 495; Francis Bauer, 496-8; and in Asclepiadeæ by Adanson, Gleichen, 516, 517; C. K. Sprengel, 513; Francis Bauer, 519; Elliott, Macbride, Link, L. C. Treviranus, 520; Ehrenberg, 521

Filices, observations on the order, and on its distribution in Terra Australis, 59; on the venation of, and the relation of the involucra to veins in various subdivisions of the genus Asplenium, 60; further observations on the order, on its proportions, and geographical distribution, and on the species found in the vicinity of the Congo, 148

Fisher, Mr., plants collected by him in Melville Island. 185

Flagellaria, observations on the genus, 52

Flinders, Matthew, his survey of the coasts of Terra Australis, 3

Flindersia, in what respects it differs from Cedreleæ, 72

Flower, the regular alternation of the divisions of the proximate organs,