1 The Evolution of Polymorphic Systems.- 2 Plant Evolution in Extreme Environments.- 3 Polymorphism in a Polynesian Land Snail, Partula suturalis vexillum.- 4 Colour and Banding Morphs in Subfossil Samples of the Snail Cepaea.- 5 Shell Size and Natural Selection in Cepaea nemoralis.- 6 Evolutionary Oscillations in Drosophila pseudoobscura.- 7 Melanism in the Two-Spot Ladybird, Adalia bipunctata, in Great Britain.- 8 The Distribution of Melanism in the Pale Brindled Beauty Moth, Phigalia pedaria, in Great Britain.- 9 Recessive Melanism in the Moth Lasiocampa quercus.- 10 Speculations about Mimicry with Henry Ford.- 11 Studies of Müllerian Mimicry and its Evolution in Burnet Moths and Heliconid Butterflies.- 12 Avian Feeding Behaviour and the Selective Advantage of Incipient Mimicry.- 13 An Analysis of Spot Placing in the Meadow Brown Butterfly, Maniola jurtina.- 14 An Esterase Polymorphism in the Bleak, Alburnus alburnus, Pisces.- 15 Gene Duplication and Haemoglobin Polymorphism.- 16 The Molecular Basis of Thalassaemia.- 17 Blood Group Interactions between Mother and Foetus.- 18 Drug Therapy as an Aspect of Ecological Genetics.- 19 Ecological Genetics and Biology Teaching.
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