Proceedings of the Royal Society of Edinburgh: Biology. Section B, Volumi 65-66

acid analysis andesite animals appears basipodites biotite birds branches bubble cæcum Caridea cells cent chromosomes correlation Corvaspis Crangon cryptomylonite cynodonts cytoplasm date of onset deposits depth described developed distal distribution dorsal duration Edin Edinburgh Edston Edward Forbes egg weight egg-mass endopodite estimate extracted fauna Fauvel felspar female fold fragments genetic genus Geol glands grains greywackes Hapalemur hatched hoatzin hornblende hyalomylonite lake lateral layer left horn Lemur length Lepilemur liver lobe loch level Loch Lomond Lond lower loch Lymnæa peregra mantle cavity margin material membrane Mirotenthes mylonite nitrogen nuclei occur ovigerous setæ Peeblesshire Physa fontinalis plagioclase PLATE pleopods pods porphyroclasts posterior Proc Psilophyton Psilophyton robustius quartz region rocks samples sediments seeds shale Silurian snails spat species specimen spermatocytes spinal ganglion sporangia stages strain structure surface Table text-fig upper loch variance variation ventral virus zone Zool