, on the larynx
--on Halitherium
--on the resemblance between the jaws of the dog and Thylacinus
--on the homology of the feet of certain marsupials
Flowers, structure of
--in relation to crossing
--of composite and umbelliferae
--beauty of
--double
Flysch formation, destitute of organic remains
Forbes, Mr. D., on glacial action in the Andes
Forbes, E., on colours of shells
--on abrupt range of shells in depth
--on poorness of palaeontological collections
--on continuous succession of genera
--on continental extensions
--on distribution during Glacial period
--on parallelism in time and space
Forests, changes in, in America
Formation, Devonian
--Cambrian
--intermittent
--thickness of, in Britain
Formica
--rufescens
--sanguinea
--flava, neuter of
Forms, lowly organised, long enduring
Frena, ovigerous, of cirripedes
Fresh-water productions, dispersal of
Fries on species in large genera being closely allied to other species
Frigate-bird
Frogs on islands
Fruit-trees, gradual improvement of
--in United States
--varieties of, acclimatised in United States
Fuci, crossed
Fur, thicker in cold climates
Furze
Galapagos Archipelago, birds of
--productions of
Galaxias, its wide range
Galeopithecus
Game, increase of, checked by vermin
Gartner on sterility of hybrids
--on reciprocal crosses
--on crossed maize and verbascum
--on comparison of hybrids and mongrels
Gaudry, Prof.
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