-in floras of Japan and N. America.
-in Galapagos Islands.

Reproduction, difference in amount of energy expended by male and female
in.

Reproductive organs, St.-Hilaire's view of affaiblissement and
development of.
-in relation to theoretical questions.

Research, Huxley and.
-justification of.

Reseda lutea, sterile with own pollen.
-R. odorata, experiment on cross-and self-fertilisation.

Resemblance, mimetic.

Resignation, expression in.

Restiaceae, former extension of.

Restricted distribution.

Retardation, Cope on.

Retrogression.

Reversion, in ammonites.
-Darwin on.
-and degeneration of characters.
-factors causing.
-hybridism and.
-Lord Morton's mare and.
-stripes of mules due to.
-struggle between Natural Selection and.
-and crossing.
-peloria and.

Review of the "Descent of Man," by J. Morley.

Reviews, Darwin on an author writing his own.
-on the "Origin of Species," by Asa Gray.
-Haughton.
-Hopkins.
-Hutton.
-Huxley.
-F. Jenkin.
-Owen.
-Wilberforce.

Rhamnus.

Rhexia, flowers of.
-R. virginica, W.H. Leggett on anthers.

Rhinoceros.

Rhinochetus.

Rhizocephala, retrograde development in.

Rhododendron Boothii.

Rhopalocera, breeding in confinement.

Rhynchoea, colour of.

Rich, Anthony (1804?-1891): Educated at Caius College, Cambridge, of
which he was afterwards an Honorary Fellow. Author of "Illustrated
Companion to the Latin Dictionary and Greek Lexicon," 1849, said to be a
useful book on classical antiquities. Mr. Darwin made his acquaintance
in a curious way--namely, by Mr. Rich writing to inform him that he
intended to leave him his fortune, in token of his admiration for his
work. Mr. Rich was the survivor, but left his property to Mr. Darwin's
children, with the exception of his house at Worthing, bequeathed to Mr.
Huxley.
-legacy to Huxley.
-letter to.
-leaves his fortune to Darwin.

Rich, Mrs., mentioned.

Richardson, R., on tablet to commemorate Darwin's lodgings at 11,
Lothian Street, Edinburgh.

Richardson, Darwin on merits of.

Rigaud, on formation of coal.

Riley, Charles Valentine (1843-95): was born in England: at the age of
seventeen he ran away from home and settled in Illinois, where at first
he supported himself as a labourer; but he soon took to science, and his
first contributions to Entomology appeared in 1863. He became
entomological editor of the "Prair