Sharp, David, on Bombus.
-on Volucella.
-"Insects."

Sharpe, Daniel (1806-56): left school at the age of sixteen, and became
a clerk in the service of a Portuguese merchant. At the age of
twenty-four he went for a year to Portugal, and afterwards spent a
considerable amount of time in that country. The results of his
geological work, carried out in the intervals of business, were
published in the Journal of the Geological Society of London ("Quart.
Journ. Geol. Soc." Volume V., page 142; Volume VI., page 135). Although
actively engaged in business all his life, Sharpe communicated several
papers to the Geological Society, his researches into the origin of
slaty cleavage being among the ablest and most important of his
contributions to geology ("Quart. Journ. Geol. Soc." Volume III., page
74; Volume V., page 111). A full account of Sharpe's work is given in
an abituary notice published in the "Quart. Journ. Geol. Soc." Volume
XIII., page xlv.
-on elevation.
-Darwin meets.
-letters to.
-on cleavage and foliation.

Sharpey, W., letter from Falconer to.
-Honorary member of Physiological Society.

Shaw, J., letter to.

Sheep, varieties of.

Sheldrake, dancing on sand to make sea-worms come out.

Shells, Forbes and Hancock on British.
-distorted by cleavage.
-means of dispersal.
-protective colour of.

Sherborn, C.D., "Catalogue of Mammalia" by A.S. Woodward and.

Shetland, comparison between flora of T. del Fuego and that of.

Shrewsbury, school.

Siberia, Rhinoceros and steppes of central.

Sicily, elephants of.
-flora of.

Sidgwick, Prof. H.

Siebold, von.

Sigillaria, an aquatic plant.

Silene, Gartner's crossing-experiments on.

Silurian, comparison between recent organisms and.
-life of.
-Lingula from the.
-corals.
-volcanic strata.

Simon, Sir John: he was for many years medical officer of the Privy
Council, and in that capacity issued a well-known series of Reports.
-reports by.

Simple forms, existence of.
-survival of.

Simpson, Sir J., on regeneration in womb.

Siphocampylus.

Sitaris, Lord Avebury on Meloe and.

Siwalik hills.

Skertchley, S.B.J., on palaeolithic flints in boulder-clay of E. Anglia.
-letter to.

Skin, influence of mind on eruptions of.

Slate, cleavage of schists and.

Slave-ants, account in the "Origin" of.

Sleep, plants' so-called.

Sleep-movements, in plants.
-of cotyledons.