. Bulletin of zoological nomenclature. 96 Bulletin of Zoological Nomenclature Wahlenberg, G. (1818), 1821. Petrificata telluris Svecanae. Nova acta Regiae Soc. Sci. Upsaliensis, Vol. 8, UpsaJiae , 1821. Additamenta quaedam ad petrificata telluris Svecanae. Nova acta Begiae Soc. Sci. Upsaliensis, Vol. 8, pp. 293-296, UpsaUae Vogdes, A. W., 1890. A bibliography of Paleozoic Crustacea from 1698 to 1889. Including a list of North American species and a systematic arrangement of genera. Bull. Geological Survey, No. 63, Washing- ton Explanation to Plate 1 Illustrations of the Lectotjrpe of Ento
. Bulletin of zoological nomenclature. 96 Bulletin of Zoological Nomenclature Wahlenberg, G. (1818), 1821. Petrificata telluris Svecanae. Nova acta Regiae Soc. Sci. Upsaliensis, Vol. 8, UpsaJiae , 1821. Additamenta quaedam ad petrificata telluris Svecanae. Nova acta Begiae Soc. Sci. Upsaliensis, Vol. 8, pp. 293-296, UpsaUae Vogdes, A. W., 1890. A bibliography of Paleozoic Crustacea from 1698 to 1889. Including a list of North American species and a systematic arrangement of genera. Bull. Geological Survey, No. 63, Washing- ton Explanation to Plate 1 Illustrations of the Lectotjrpe of Entomostracites expansus Wahlenberg, 1821 (Asaphus expansus (Wahlenberg, 1821)), here selected. Palaeontological Institute, Uppsala University, No. Og. 23. All the figures are twice the natural size. The specimen is whitened with ammonium chloride. The photographs are by Mr. N. Hjorth, Palaeontological Institute, Uppsala University. They have not been retouched. Fig. 1. Dorsal view of the cephalon and the foremost thoracic segments Fig. 2. Lateral view of the dorsal exoskeleton Fig. 3. Ventral view of the cephalon to show the cephalic doublure Fig. 4. Anterior view of the cephalon Fig. 5. Dorsal view of the pygidium. 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 International Commission on Zoological Nomenclature. London
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