264 CALIFORNIA ACADEMY OF SCIENXES. 



AGNOSTUS. 



BiDESS Vogd., 1892; American Geol., vol. 4, p. 392, pi. 10, tig. 5. 



Sec. Limbati. 

 CANADENSIS Bill., 1860; Canadian Naturalist, vol. 5, p. 304, lig. 3. 



Point Levis, Quebec. Taconic. 



CANADENSIS Bill.; 1865; Pal. Foss., vol. 1, p. 397, tig. 374. 



CANADENSIS Briigg., 1886; Geol. Fiiren. Stock. Fiirhaudl., vol. 8, p. 



207. cf. Agnostus hyhridus BriJgg. 

 CANADENSIS Vogd., 1892; American Geol., vol. 4, p. 390, pi. 9, tig. 9. 



Sec. Longifrontes. 

 coLORADOENSis Shnm., 1861; Am. Jour. Sci., 2d series, vol. 32, p. 



218. Burnet County, Texas. Taconic. 

 COLORADOENSIS Vogd., 1892; American Geol., vol. 4, p. 390, pi. 9, fig. 



16. cf. Ar/nosius neon. 

 COMMPNis H. '& W., 1877; U. S. Geol. Expl. 40th Par., vol. 4, p. 228, 



pi. 1, figs. 28, 29. White Pine, Nevada. Taconic. 

 COMMUNIS Wal., 1884; Pal. Eureka Dist., Mon. II. S. Geol. Survey, 



vol. 8, p. 27. 

 COMMUNIS Brogg., 1866; Geol. Fiiren. Stock, Forhandl., vol. 8, p. 207. 



cf. Agnostus cyclopyge Tullb. Olenus zone. 

 COMMUNIS Vogd., 1892; American Geol., vol. 4, p. 390, pi. 9, fig. 15. 



Sec. Longifrontes. 

 DESiDERATus Wal., 1889; Proc. Natl. Mus., vol. 12, p. 39. Salem, 



N. Y. Taconic. 

 DESIDERATUS Wal., 1891; 10th Eep. U. S. Geol. Survey, p. 629, pi. 80, 



tig. 5. Olenellus zone. 

 DKSJDERATCS Vogd., 1892; American Geol., vol. 4, p. 383, pi. 10, fig. 7. 



Sec. Parvifrontes. 

 DisPARLis Hall, 1863; 16th Rep. New York State Cab. Nat. Hist., p. 



179, pi. 10, tigs. 25-27. Oseola Mills, Wis. Taconic. 

 DISPARLIS Vogd., 1892; American Geol., vol. 4, p. 394, pi. 10, tig. 15. 



Sec. Ljevigati. 

 FABius Bill., 1865; Pal. Foss., vol. 1, p. 298, fig. 289. Table Head 



and Pistolet Bay, N. F. Cambrian? 

 FABIUS Vogd., 1892; American Geol., vol. 4, p. .396, pi. 9, tig. 10. 



Sec. Arthrorhachis. 

 GLABBA Bill., 1865; Pal. Foss., vol. 1, p. 297, fig. 288. Table Head 



and Pistolet Bay, N. F. Cambrian? 

 GLABBA Vogd., 1892; American Geol., vol. 4, p. 395, pi. 9, fig. 6. 



Sec. Arthrorhachis. 

 IXTERSTRICTUS White, 1874; Prelim. Eept. Invert. Foss., i?. 7. Ante- 



lo^ie Springs, Utah. Taconic. 

 IXTERSTRICTUS White, 1877; U. S. Geog. and Geol. Siirvey W. 100th 



Meridian, p. 38, pi. 2, figs. 5 a, 5 b. 

 IXTERSTRICTUS Wal., 1886, Bull. U. S. Geol. Survey, No. 30, p. 149 



pi. 16, figs. 6, 6 a. 



