CATALOGUE OF TRILOBITES. 359 



TRIAKTHRUS. TRINUCLEUS. 



- beckii Mather, 1842; Geol. New York, 1st Geol. Dist., p. 390, fig. 24 (1). 



beckii Emmons, 1842; Geol. New York, 2d Geol. Dist., p. 399, fig. 



110 (1). 



beckii Vanuxem, 1843; Geol. New York, 3d Geol. Dist., p. 57, fig. 8(1). 



- beckii Hall, 1843; Geol. New York, 4th Geol. Dist., p. 504. 

 Calymene beckii Hall, 1847; Pal. New York, vol. 1, p. 237, pi. 64, figs. 



2a-e. 

 Calymene beckii Hall, 1847; Pal. New York, vol. 1, p. 250, pi. 66, tigs. 



2 a-k (not pi. 67, figs. 4 a-e, Atops trilineatus). 

 Syn., Atops trilineatus (Emmons) Hall, 1847; Pal. New York, vol. 1, p. 



237. 

 Calymene beckii Hall, 1848; Am. Jour. Sci., 2d series, vol. 5, p. 32*2, 



figs. 1, a, b, 2a-g. 



beckii Emmons, 1848; Am. Assoc. Adv. Sci., p. 17. 



beckii Haldeman, 1848; Am. Jour. Sci., 2d series, vol. 8, p. 137. 



beckii Emmons, 1855; Am. Geology, vol. 1, pt. 2, p. 214, pi. 15, fig. 12. 

 Calymene beckii Rogers, 1858; Geol. Survey Penn., vol. 2, p. 820, 



fig. 613. 



beckii Barr., 1861; Soc. Geol. France, 2d series, p. 269, pi. 5, figs. 



11, 12. 



- beckii Logan, 1863; Geol. Canada, p. 202, fig. 200. 



beckii Miller, 1874; Cincinnati Quart. Jour. Sci., vol. 1, p. 146. 



- beckii Wai., 1876; Trans. Albany Inst., vol. 10, p. 23, pi. 2, figs. 



1-16. 



CANADENSIS Smith, 1861; Canadian Jour., vol. 6, p. 275. Hudson. 



- FISCHERI Bill., 1861; Pal. Foss., vol. 1, p. 291, fig. 280. Table Head, 



Pistolet Bay and Portland Creek, N. F. 



GLABEB Bill., 1859; Canadian Naturalist, vol. 4, p. 382. Lake St. 



Johns, Utica Slate. 



- GLABEK Bill., 1863; Geol. Canada, p. 202, fig. 198. 



SPINOSUS Bill., 1857; Geol. Survey Canada Rep. of Progress, 1853-56, 



p. 340. Township of Gloucester, County of Carleton, Canada, 

 Utica Slate. 



SPINOSUS Bill, 1859; Canadan Naturalist, vol. 4, p. 383. 



- SPIXOSUS Bill., 1863; Geol. Canada, p. 202, fig. 199. 



- SPINOSCS Ami, 1882; Trans. Ottawa Nat. Club, vol. for 1882-83, p. 88, 



pi. 1, fig 

 Trimerus Green, 1832; Monthly Am. Jour. Geol., vol. 1, p. 560. (See 



Homalonotus delphinocephalus and H. jacksoni.) 



TRINUCLEUS Lhwyd, 1698; Lithophyacii Brittannici Ichnographia, Epistola 

 1. Murch., Silurian System, 1839, p. 659. Sir R. I. Murchison 

 has revived this old name of Lhwyd's, and all subsequent palaeon- 

 tologist have adopted it. Lhwyd's description meant no more 

 than the general name of Trilobite of the more modern writers, 

 and could not, except by courtesy, set aside Dr. Jacob Green's 

 genus Cryptolithus. 



