An Essay on Classification |
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3e sér Acalephs Acephala affinities analogies Anatomie animal kingdom animals and plants Annelides Articulata ascertain Beiträge Berlin Birds Brachiopoda branches Bryozoa Cephalopoda Cetacea character characteristic characterized Cirripedia classification complication connection considered Crinoids crown 8vo Crustacea Cuvier Decapods distinct diversified divisions Echinoderms eggs Embryology embryonic ence Entomostraca Entwickelung Evolutio exhibits thought existence facts families Fishes fossiles genera genus geographical geological geological periods globe gradation Hist homologies Hydroids identical individuals Infusoria Insects investigations larvæ Leipzig Leuckart limits Linnæus living London Mammalia Mollusca Mollusks Müller's Arch Myriapoda natural groups Natural History naturalists orders Paris past ages peculiarities period physical agents plan of structure Polyps Post 8vo present Radiata reference relations representatives Reptiles respecting Rotifera Second Edition Sect species successive Thiere tion true Tunicata types Ueber Vertebrata wiss Woodcuts Worms Zeitsch Zool Zoology