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Jan 44

Murchison tells me that Verneuil or D'Archiac some time ago established that horizontal & vertical ranges of species are related. Forbes came to same conclusion in Aegean, so Murchison says! Same conclusion in Land-shells, compared with marine. And Forbes now finds two formations in India representative of two divisions of the Cretaceous period; in one of which some species representative & a few identical, & in the other I believe all representative. He further finds, that those species

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(N.B all this is in the Principles)

which are identical, are those which have greatest vertical range & Lyell finds these very species in India so that law established. Hence different rates of extinction. Murchison has brought forward great case of separation of conformable [bunter]-sandstone from New Red, where Palæozoic abruptly change into Secondary - Reptiles in Palæozoic Compares the Palæozoic

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break to Cretaceous & Tertiary break. On other hand Murchison finds very general unconformability between Permian & Coal (?) though no break in organic life. V. Russian Book

Forbes showed that me that Ammonite with reticulated chambers in early life is an Ammonite with simple chambers "Anamorphoses"

{Yet is not Ammonite the oldest of the two.??

Forbes law of Goethe-like morphology in Corallines - vesicles of.