PART III. 



NON-TRILOBITIC GENERA AND SPECIES. 



MEROSTOMATA. 



Eubypterida:. 



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



Silurian. Carboniferous. 

 DOLICHOPTERUS Hall, 1859; Palaeont, 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. 

 CiLYPTOSCORPius Peach, 1880; Trans. Eoyal Soc. Edinb., vol. 30, p. 516. 



Carboniferous. 

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



Carboniferous. 

 EcRYPTERELLA Matt., 1888; Trans. Roy. Soc. Canada, vol. 6, p. 60. 



Devonian. 

 Pterygotid^. 



Ptebygotos Agas., 1844; Mon. Poissons Foss., note, p. xix. 



Silurian. Devonian. 

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



Stylonurcs Page, 1856; Advance Text-Book Geology. 



Silurian. Devonian. 

 SYNZIPHOSURA. 



.\C'A NTHOTELSON M. and W., 1865; Proc. Acad. Nat. Sci. Phila., vol. 17. p. 

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



XIPHOSURA. 



Cyclid^. 



CYCL0S De Kon., 1841; Mem. Acad. Sci. Belgique, vol. 14, p. 13. 



Carboniferous. 

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



Bunodida:. 



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



of. Exaphiuru» Nieszk., 1859; Archiv Nat. Liv-, Esth- u. Kurl., vol. 



1, p. 380. Silurian. 



Hemisapis H. W., 1865; Quart. Jour. Geol. Soc. London, vol.21, p. 490. 



Silurian. 



