SYNOPSIS OF GENERA. 
Genus PH A COPS, Emmrich. 1839. 
1770. Echinitts, Zeno. Nene Physik. Belustig-. vol. i. 
1822. Calymene, Brongniart. Hist. Nat. Crust. Foss. 
1823. Trilobites, Schlotheim. Nachtr. ii, zur Petref. 
1824. Calymene, Hceninghaus. Noggerrath’s Rheinl. ii. Westphal. and Isis. 
1825. Caly7nene, Bronn. Leonhardt’s Zeitsch. Min. 
1825. Trilobites, Sternberg. Verhand. d. Vaterl. Mus. 
1826. Calymene, Dalman. Ueber Palseaden. 
1831. Calymene, Stbiningbr. Soc. g6ol. d. Fj-ance. 
1832. Calymene, Goldfuss. Dechen’s Handb. d. Geognosie. 
1832. Calymene, Green. Mon. Ti'ilob. N. America. 
1835. Calymene, Bronn. Lethsea geognostica. 
1837. Calymene, Bocklahd. Bridgewater Treatise. 
1837. Trilobites, Qdbnstbdt. Wiegmann. Arcliiv. 
1838. Trilobites, Saks and Boeck. Gsea Norvegica. 
1839. Calymene, Murchison. Silurian System. 
1839. Phacops, Emmrich. Be Trilob. Dissert. 
1840. Calymene, Sowerby. Trans. Geological Society. 
1840. Calymeiie, Eichwald. Urwelt Russlands. 
1840. Calymene, Muenstbr. Beitr. iii, zur Petrefaktenkunde. 
1840. Calymene, Milne-Edwards. Hist. Nat. Crust. 
1840. Phacops, von Buch. Beitr. zur Geol. Russlands. 
1841. Calymene, Phillips. Pal. Foss. Cornwall, Devon, and Somerset. 
1842. Calymene, D’Archiac and De Vbrnbuil. Trans. Geol. Soc. Loud. 
1842. Calymene, Muenstbr. Beitr. zur Petrefaktenkunde. 
1843. Phacops, Goldfuss. Neues Jahrb. fiir Min. 
1843. Calymene, Asaphus, F. A- Riemer. Vei'st. des Harzgeb. 
1843. Phacops, Burmeister. Organiz. der Ti-ilobiten. 
1843. Phacops, Portlock. Rept. Geol. Londonderiy. 
1843. Calymene, Hall. Rept. Fourth Dist. N. Y. 
1844. Phacops, C. F. Rcemer. Rhein. Uebergangsgeb. 
1844. Calymene, Owen. Geol. Expl. Iowa, Wis., Ill. 
1845. Phacops, Emmrich. Neues Jahrb. fiir Min. 
1845. Phacops, Murchison, De Verneuil and Kbyserling. Russie et Oural. 
1846. PoiilocMa, McCoy. Silur. Foss. Ireland. 
1846. Phacops, Gbinitz. Grundr. der Versteinerungen. 
1846. Phacops, Pictet. Traits E16in. de Pal4ont. 
1846. Phacops, Barrande. Notice prdlim. and Nouv. Tiilob. 
1848. Phacops, Salter. Mem. Geol. Survey United Kingdom. 
1849. Phacops, Richter. Pal. des Thiiringerwaldes. 
1850. Phacops, the Brothers Sandbbrger. Verst, d. Rhein. Sch. Syst. 
1850. Phacops, Portlockia, McCoy. Ann. and Mag-. Nat. Hist. 
1.850. Phacops, De Verneuil. Bull. Soc. g^ol. de France. 
1850. Phacops, Salter. Quart. Jour. Geol. Society. 
1850. Phacops, F. A. Rcemer. Beitr. i zur Harzgeb. 
1851. Portlockia, McCoy. Synoii. Pal. Foss. Woodwardian Mus. 
1851. Phacops, McCoy. Synop. Pal. Foss. Woodwardian Mus. 
1852. Phacops, Barrande. Syst. Sil. d. BohSme, vol. i. 
1852. Phacops, F. A. Rcemer. Beitr. ii zur Harzgeb. 
J853. Ptecops, Geinitz. Grauwackenf. Sachsen. 
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