PART III 



NON-TRILOBITIC GENERA AND SPECIES. 



MEKOSTOMATA. 



EURYPTERID^. 



EuRYPTERus De Kay, 1825; Annals Lyceum Nat. Hist., vol. 1, p. 375. 



Silurian. Carboniferous. 

 DoLiCHOPTERus Hall, 1859; Palteout, New York, vol. 3, p. 414. Silurian. 

 EcHiNOGNATHus Wal., 1882; Am. Jour. Sci., 3d series, vol. 23, p. 213. 



Silurian. 

 Adelophthalmus Jordan and Meyer, 1854; Crust. Steinkohl. Saarb., p. 8. 



Carboniferous. 

 (iLYPTOSCORPius Peach, 1880; Trans. Koyal Soc. Edinb., vol. 30, p. 516. 



Carboniferous. 

 Arthropleura Jordan and Meyer, 1854; Crust. Steinkohl. Saarb., p. 13. 

 . Carboniferous. 



EuRYPTEKELLA Matj»., 1888; Trans. Koy. Soc. Canada, vol. 6, p. 60. 



Devonian. 



PTERYGOTIDa;. 



I'TERYGOTus Agas., 1844; Mon. Poissons Foss., note, p. xix. 



Silurian. Devonian. 

 Slimonia Page, 1856; Advance Text-Book Geology, p. 135. Silurian. 



Stylonurus Page, 1856; Advance Text-Book Geology. 



Silurian. Devonian. 

 SYNZIPHOSUEA. 



AcANTHOTELSON M. and W., 1865; Proc. Acad. Nat. Sci. Phila., vol. 17. p. 

 46; Geol. Survey Illinois, vol. 2, 1866, p. 399. Carboniferous. 



XIPHOSURA. 



Cyclid^. 



Cyclus De Kon., 1841; Mem. Acad. Sci. Belgique, vol. 14, p. 13. 



Carboniferous. 

 DiPELTi.s Pack., 1885; Ameritran Naturalist, vol. 19, p. 293. Carboniferous. 



BvtiODlUM. 



BuNODES Eichw., 1854; Beitrage Geol. u. Pal. Kuss., p. 131. Silurian. 



cf. Exapinuruf< Nieszk., 1859; Archiv Nat. Liv-, Esth- u. Kurl., vol. 



1, p. 380. Silurian. 



Hemisapis H. \V., 1865; Quart. Jour. Geo). Soc. London, vol.21, p. 490. 



Silurian. 



