ie Farmer" (Chicago), and came under
the influence of B.D. Walsh. In 1868 Riley became State Entomologist of
Missouri, and in 1878 Entomologist to the U.S. Department of
Agriculture, a post he resigned in 1894 owing to ill-health; his death
was the result of a bicycle accident. (Taken principally from the
"Proceedings of the Entomological Society of Washington," Volume III.,
1893-6, page 293.)
-letters to.
-mentioned.

Rio Janeiro, absence of erratic boulders near.
-Agassiz on drift-formation near.

Rio Negro.

Rio Plata.

Ritchie, Mrs., visit to Down.

Rivers, The late Mr. Thomas: of Sawbridgeworth, was an eminent
horticulturist and writer on horticulture.
-letters to.

Robin, attracted by colour of Triphaena (Triphoea).

Robinia, insect visitors of.

Rocks, bending when heated.
-condition in interior of earth.
-fluidity of.
-metamorphism of (see also Metamorphism).

Rocky Mountains, wingless insects of the.

Rogers, W.B. and H.D., on cleavage.
-on coalfields of N. America.
-on parallelism of axis-planes of elevation and cleavage.

Rolleston, George (1829-81): obtained a first-class in Classics at
Oxford in 1850; he was elected Fellow of Pembroke College in 1851, and
in the same year he entered St. Bartholomew's Hospital. Towards the
close of the Crimean War, Rolleston was appointed one of the Physicians
to the British civil hospital at Smyrna. In 1860 he was elected the
first Linacre Professor of Anatomy and Physiology, a post which he held
until his death. "He was perhaps the last of a school of English
natural historians or biologists in the widest sense of the term." In
1862 he gave the results of his work on the classification of brains in
a lecture delivered at the Royal Institution, and in 1870 published his
best known book, "Forms of Animal Life (Dict. Nat. Biography).
-address in "Nature" by.
-on the orang-utang.
-adhesion to Darwin's views.
-letter to.
-letter to Darwin from.
-mentioned.

Rollisson.

Roman villa at Abinger.

Romanes, G.J. (1848-94): was one of Mr. Darwin's most devoted disciples.
The letters published in Mrs. Romanes' interesting "Life and Letters" of
her husband (1896) make clear the warm feelings of regard and respect
which Darwin entertained for his correspondent.
-Darwin on controversy between Duke of Argyll and.
-on graft-hybrids.
-letters to.
-letter to Darwin from.
-letter to "Nature" in reply to