SYNOPSIS OF GENERA. 
XXIX 
1887. Phacojys, CEhlbrt. Ann. de la Soeiote geologiiioe. 
1888. Pliaayps, Fhech. Zeitschr. der deutsch. geol. Gesellscliaft. 
Diagnosis. Body oval. Cephalon parabolic; 
genal angles obtuse, or produced into minute 
spines. Glabella tumid, prominent, widest ante¬ 
riorly; the two anterior pairs of lateral furrows 
indistinct. Eyes very large, conspicuous, bearing 
numerous corneal lenses. Thorax sub-quadrate ; 
segments eleven; pleurge arched, and rounded at their extremities. Pygidium 
moderately large, composed of few aimulations; margin entire and not pro¬ 
longed into a terminal spine. 
Genus DALMANITES, Barrande. 1852. 
1772. Entomolithus, Born. Lithoph. Boi'niaii. 
1781. Trilobiis, Brubnnich. Kjolien. Sellsk. Skiivtei’. Nye Samml. 
1794. EntoinoUthiis, Rbuss. Mayer’s Samml. pliys. Aufs. n 
1811. Trilobitcs, Parkinson. Oi-ganic Remains. 
1821. Entomostracites (paiihii), Wahlenberg. Nov. Act. Upsala. 
1822. Asaphus, Brongniart. Hist. Nat. Crust, foss. 
1823. Trilobitcs, Schlotheim. Nachti’. ii ziir Petrefakt. 
1825. IT/’iZo&ito, Sternberg. Verhandl. des Vaterl. Mus. 
1826. Asaphus, Dalman. Ueber Pakeaden. 
1829. Asaphus, Holl. Handb. dei' Petrefacteii. 
1832. Asaphus, Eaton. Geological Text-book. 
1832. Asaphus, Goldfuss. Dechen’s Handb. der Geognosie. 
1832. Asaphus, Green. Monog. Tillob. N. America,. 
1835. Asaphus, Green. Suppl. Monog. N. Amer. Trilol). 
1837. Asaphus, Hisinger. Lethsea Suecica. 
1837. Asaphus, Buckland. Bridgewater Ti'eatise. 
1837. Asaphus, Quenstedt. Wiegmann. Arcliiv. 
1839. Asaphus, Calymene, Murchison. Silurian System. 
1839. Phaeops partim, Emmrich. De Trilob. Dissert. 
1840. Asaphus, Milne-Edwards. Hist. Nat. Crust. 
1840. Phaeops, von Buck. Geb. Format. Russlands. 
1841. Asaphus, Aspidolites, Conrad. Fifth Ann. Rept. Pal. N. Y. 
1843. Asaphus, Hall. Rept. Fourth. Dist. N. Y. 
1843. Asaphus, Goldfuss. Neues Jahrb. fiir Min. 
1843. Phaeops, Burmbister. Organiz. d. Trilobiten. 
1843. Phaeops, Portlock. Rept. Geol. Londonderry. 
1845, Dalmania, Emmrich. Neues Jahrb. fiir Min. 
1845. Phaeops, Asaphus, Murchison, Db Verneuil and Keysbrling. Russie et Oural. 
1846. Phaeo])s, Geinitz. Gi-undr. der Versteinerungen. 
1846. Phaeops, Barrande. Notice pr61imin. 
1846. Phaeops, Rouault. Bull. Soc. geol. de France. 
1847. Odontochile, Coeda. Pi'odi-om Monog. bohin. Trilob. 
1848. Phaeops, Hall. Pal. N. Y., vol. i. 
