CATALOGUE OF TRILOBITES. 359 



TRIARTHEUS. TRINUCLEUS. 



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



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



110 (1). 



beckii Yannxem, 1843; Geol. New York, 3(1 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. 



2 a-e. 

 Calymejie beckii Hall, 1847; Pal. New York, vol. 1, p. 250, pi. 66, figs. 



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

 8yn., Atops trilineatus (Emmons) Hall, 1847; Pal. New Y'ork, vol. 1, p. 



237. 

 Cahjmene beckii Hall, 1848; Am. Jour. Sci., 2d series, vol. 5, p. 322, 

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

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



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



beckii Emmons, 18.)5; 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 Wal., 1876; Trans. Albany Inst., vol. 10, p. 23, pi. 2, figs. 



1-16. 



CANADEN.SI8 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. 

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



Johns, Utica Slate. 



GLABER Bill., 1863; Geol. Canada, p. 202, fig. 19S. 



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; Cauadan Naturalist, vol. 4, p. 383. 



SPINOSUS Bill., 1863; Geol. Canada, p. 202, fig. 199. 



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



pi. 1, fig 

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

 Homalonotus delphbiocephalus and H. jacksoni.) 



Trinucleus Lhwyd, 1698;Lithophyacii Brittannici Ichnograiihia, Epistola 

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

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

 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 Cri/ptolithus. 



