Patterns of Evolution as Illustrated by the Fossil Record by A. Hallam (Eds.)

By A. Hallam (Eds.)

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Alexander’s statement is usually cited as I gave it - as a lament for a world with no new directions (as by Wordsworth in his Supplementary Essay of 1815). But the first classical reference I can find cites it in an opposing context (from Plutarch’s Morals): ETERNAL METAPHORS 25 “Alexander wept when he heard from Anaxarchus that there was an infinite number of worlds. ’ ” A better statement, t o be sure. Our ignorance is in no danger of ceding its general domination t o our understanding. Essay on classification.

All are somewhat modified after schemes proposed by the following: A, Hyman, 1940; B, Hadzi, 1963; C, Salvini-Plawen, 1969; D. Jlgersten, 1972. W. VALENTINE contributed especially t o molluscan phylogeny. Note that instead of the appearance of two phyla at the uppermost ends of the upreaching phylogenetic tree - arthropods and chordates, presumably represented at their peaks by butterflies and man - there are three peaks; arthropods, chordates and molluscs. The most recent of these schemes is by Jigersten (1972; Fig.

Thus, it either is or is not true that the evolution of the coelom is correlated with a destabilization of trophic resource regimes produced by continental coalescence. The psychological issue of why and how scientists choose their basic attitudes and metaphors is another matter, and one for which I claim very little insight. The historical choices of major palaeontologists have been the theme of this paper. I would only reiterate my claim that attitudes are largely set by a priori predispositions, and that these predilections, in turn, are strongly influenced by cultural belief and social position.

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