. Outlines of zoology. Zoology. FlG. 9.—Cephalopod (paper nautilus, female), The nervous system has three chief pairs of nerve centres or ganglia. In many cases the larval stages are very characteristic. Arthropods.—This large series includes Crustaceans. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Thomson, J. Arthur (John Arthur), 1861-1933. Edinburgh, Glasgow and London, H. Frowde and Hodder & Stoughton

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Keywords: ., bookauthorth, bookcentury1800, bookdecade1890, booksubjectzoology