264 CALIFORNIA ACADEMY OF SCIENCES. 



AGNOSTUS. 



- BIDEXS Vogd., 1892; American Geol., vol. 4, p. 392, pi. 10, fig. 5. 



Sec. Limbati. 



CANADENSIS Bill., I860; Canadian Naturalist, vol. 5, p. 304, fig. 3. 



Point Levis, Quebec. Taconic. 



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



CANADENSIS Brogg., 1886; Geol. Fdreii. Stock. Forhaiidl., vol. 8, p. 



207. cf. Agnostus hybridus Brogg. 



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



Sec. Longifrontes. 



COLORADOENSIS Shum., 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. Aynostus neon. 



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



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



COMMUNIS Wai., 1884; Pal. Eureka Disk, Mon. U. S. Geol. Survey, 



vol. 8, p. 27. 



COMMUNJS Brogg., 1866; Geol. Foreii. Stock. Fdrhaudl., vol. 8, p. 207. 



cf. Agnostus cyclopyge Tullb. Oleiius zone. 



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



Sec. Longifrontes. 



- DESIDERATUS Wai., 1889; Proc. Natl. Mus., vol. 12, p. 39. Salem, 



N. Y. Taconic. 



DESIDERATUS Wai., 1891; 10th Hep. U. S. Geol. Survey, p. 629, pi. 80, 



fig. 5. Olenellus zone. 



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



Sec. Parvifrontes. 



- DISPARLIS Hall, 1863; 16th Kep. New York State Cab. Nat. Hist., p. 



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



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



Sec. Laevigati. 



-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, fig. 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. 



INTERSTRICTUS White, 1874; Prelim. Kept. Invert. Foss., p. 7. Ante- 



lope Springs, Utah. Taconic. 



- INTERSTRICTUS White, 1877; U. S. Geog. and Geol. Survey W. 100th 



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



- INTERSTRICTUS Wai., 1886, Bull. U. S. Geol. Survey, No. 30, p. 149 



pi. 16, figs. 6, 6 a. 



