Natural Science, 12. köide

acid American animals appears Astacus beds biological botany branches British brush-footed butterflies butterflies calyx carpels cells character chromatin classification collection colour conclusion Crag crinoids cross-vein Crustacea cubitus Cunnington Darwin Davis Strait deposits described Dipeltis Eocene evidence expedition fact fauna figures fish flakes flints flowers forewings fossil genera genus geological geologist geotropic gravel Greenland important insects interesting Islands Journ lake larva Lepidoptera less living London Lyell mammals matter means Miocene Museum Natural History Natural Science Natural Selection naturalists Neolithic neuration North Nymphalidae observations occur organ original paper Papilionides Pentacrinus physiology Pieridae pinnules plants Plateau plates Pleistocene Plesiosauria Pliocene position present Prof Professor published radius recent reference remarkable scientific Society specialised species specimens stamens Strait structure surface Tertiary theory tion University variations vein volume whales wing zoology