CATALOGUE OF TKILOBITES. 263 



AGNOSTUS. 



Series B (Fallaoes). This series has a smaller head, and moderately 

 broad limb. Cheeks large; basal lobes rather large with a broad 

 posterior lobe to the axis of the pygidium. Type Agnostm fallax 

 Liurs. 

 Sec. IV. LiEViGATi. The dorsal grooves marking the glabella and 

 axis of the thorax and pygidium are wanting, or faintly indicated. 

 Crust smooth, sometimes with slight indications of striiB. Limb 

 on the head disappearing; on the pygidium it becomes broad. 

 Type, Agnosius lievirjafus Dalm. 

 Sec. V. Arthrorhachis. The glabella is prominent, long and marked 

 with small basal lobes; the axis of the pygidium is short, as in 

 AgnoHtus tardus Barr. 



ACADicu.s Hartt, 1868; Acadian Geology, p. 655, fig. 229 (3d ed.) St. 



John, N. B. Taconic. 



Syn., mnUis Hartt, 1868; Acadian Geology, p. 656, (3d. ed.) 



similis Hartt (Walcott), 1884; Bull. U. S. Geol. Survey, No. 

 10, p. 22. 



ACADIC0S Wal., 1884; Bull. U. S. Geol. Survey, No. 10, p. 22, pi. 2, 



figs. 2, 2 a, e. 



AC'ADicus Vogd., 1892; American Geol., vol. 4, p. 386, pi. 9, fig. 7. 



Sec. Limbati. 



ACADICU.S var. declivis Matt., 1885; Tran. Eoyal. Soc. Canada, vol. 



3, p. 70, pi. 7, figs. 6 a-b. St. John. 



ACADiTus var. DECLIVIS, Vogd., 1892; American Geol., vol. 4, p. 387, 



pi. 9, fig. 8. Sec. Limbati. 

 ACUTiLOBU.s Matt., 1885; Trans. Eoyal Soc. Canada, vol. 3, p. 73, pi. 



7, fig. 10. St. John. 

 ACUTILOBUS Vogd., 1892; American Geol., vol. 4, p. 384, pi. 9, fig. 1. 



Sec. Longifrontes. 

 AMERICANOS Bill., i860; Canadian Naturalist, vol. 5, p. 302, fig. 1. 



Point Levis, Quebec. Taconic. 



AMERICANOS Bill., 1865; Pal. Foss., vol. 1, p. 395, fig. 372. 



AMERICANOS Brogg., 1886; Geol. Foren. Stock. Forhandl., vol. 8, p. 



207. cf. Agnostus punciuosus Ang. var. 

 AMERICANOS Vogd., 1892; American Geol., vol. 4, p. 389, pi. 9, fig. 5. 



Sec. Longifrontes. 

 BisECTOS Matt., 1891; Trans. Koyal Soc. Canada, vol. 9, p. 50, pi. 13, 



figs. 2 a b. Navy Island, St. John, N. B. Taconic. 

 KiDENs Meek, 1873; 6th Ann. Rep. U. S. Geol. Survey Territories, p, 



463. Gallatin City, Montana. Taconic. 

 RiDENS Wal., 1884; Pal. Eureka Dist., Mou. U. S. Geol. Survey, vol. 



8, p. 26, pi. 9, figs. 13, 13 a. 



BiDENS Briigg., 1866; Geol. FiJren. Stock. Furhandl., vol. 8, p. 207. 



cf. Agnostus parvifroiiH Linrs. 



