CATALOGUE ^OF TRILOBITES. 289 



CERAURUS Green, 1832; Monthly Am. Jour. Geol., vol. 1, p. 560, pi., fig. 6. 

 Mon. Tril. N. A., p. 83, cast 33, pi., fig. 10. 



- Hal], 1847; Pal. New York, vol. 1, p. 242. 



Syn., Otarion (in part) Zenk., 1833; BeitrageNat. Urwelt, p. 44. 



Arges (in part) Goldf., 1843; Neues Jahrbuch fiir Mineral, p. 5. 

 Cyphaspis (in part) Burm., 1843; Org. Trilobiten, p. 104. 

 Amphion (in part) Portl., 1843; Geol. Sur. Londonderry, p. 272. 

 Cyphaspis (in part) McCoy, 1846; Sil. Foss. Ireland, p. 44. 

 Cheirurus Eeyr., 1846; Unters. Trilobiten, etc., II, p. 3. 

 Eccoptochile Cord., 1847; Prodr., p. 245. 

 Actinopeltes Cord., 1847; Prodr., p. 247. 



Crotalocephalus Salt., 1853; Mem. Geol. Survey United King- 

 dom, decade 7, pi. 2, p. 10. 

 Cyrtometopus Ang., 1854; Pal. Scand., p. 32. 

 Sphcerocoryphe Ang., 1854; Pal. Scand., p. 65. 

 Pseudophceroxochus Schm., 1881; Kev. Baltic Sil. Tril., p. 130. 

 Nieszkowskia Schm., 1881; Kev. Baltic Sil. Tril., p. 130. 

 Cheirurus APPOLLO Bill., 1860; Canadian Naturalist, vol. 5, p. 322, 



fig. 28. Point Levis, Quebec. Limestone No. 2. 

 Cheirurus APPOLLO Bill., 1865; Pal. Foss., vol. 1, p. 413, fig. 397. 

 Cheirurus bimucronatus (Murch.) Koemer, Die Sil. Fauna W. Tenn., 

 p. 80, pi. 5, fig. 19. Not Murchison's species. (See Ceraurus 

 niagarensis Hall.) 



crosotus Lock. (See Acidaspis crosotus.) 



Cheirurus ERYX Bill., 1860; Canadian Naturalist, vol. 5, p. 322, fig. 

 30. Point Levis, Quebec. Limestone No. 2, also Phillipsburgh. 

 Cheirurua ERYX Bill., 1865; Pal. Foss., vol. 1, p. 413, fig. 399. 

 Cheirurus GLAUCUS Bill., 1865; Pal. Foss., vol. 1, p. 323, fig. 308. 



Stanbridge Range 6, lot 20, Canada. 



Cheirurus ICARUS Bill., 1860; Canadian Naturalist, vol. 5, p. 67, fig. 

 14. Anticosti. Hudson. 



Cheirurus ICARUS Bill., 1863; Geol. Canada, p. 219, fig. 231. 



- ICARUS Meek, 1873; Pal. Ohio, vol. 1, p. 162, pi. 14, tig. 11 a, b, c. 

 ICARUS Miller, 1874; Cincinnati Quart. Jour. Sci., vol. 1, p. 133. 



Cheirurus INSIGNIS (Beyr.) Hall, 1852; Pal. New York, vol. 2, p. 300; 



also p. 306, pi. 67, figs. 9, 10. Not Beyrich's species. 

 insignis. (See Ceraurus niagarensis Hall.) 



- MERCURIUS Bill, 1865; Pal. Foss., vol. 1, p. 285, fig. 272. Cow Head, 



N. F. 



- NIAGARENSIS Hall, 1867; 20th Kep. New York State Cab. Nat. Hist., 



p. 376, pi. 21, fig. 10. Wauwatosa, Wis. Niagara. 



- NIAGARENSIS Hall, 1870; 20th Rep. New York State Cab. Nat. Hist. 



(2d ed.), p. 427, pi. 21, figs. 10, 11. 



Syn., Sph&rexochus romingerit Hall; Doc. Ed. 28th Eep. New York 

 State Mus. Nat. Hist. Explanation of pi. 32, fig. 16 (erroneous 



reference). 

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