-348 CALIFORNIA ACADEMY OP SCIENCES. 



PTYCHOPAKIA. 



Crepicephalus (Bathyurus) ANGULATUS H. & W., 1877; U. S. Geol. 

 Expl. 40th Par., Palaeont., vol. 4, p. 220, pi. 2, fig. 28. Potsdam 

 group of Pogonip Mt., White Pine, Nev. 



? ANGULATUS Wai.. 1884; Pal. Eureka Dist., Mon. U. S. Geol. Survey, 



vol. 8, p. 269. 



? ANNECTANS Wai., 1884; Pal. Eureka Dist., Mon. U. S. Geol. Survey, 



vol. 8, p. 91, pi. 12, fig. 18. Hamburg Eidge, Nev. Cambrian. 

 Conoceph. ANTIQUATUS Salt., 1859; Quart. Jour. Geol. Soc. London, 



vol. 15, p. 554, fig. 2. Georgia, Vermont. Taconic. 



Conoceph. ANATINUS Hall, 1863; 16th Kep. New York State Cab. Nat. 



Hist., p. 158, pi. 7, figs. 34, 35, and pi. 8, fig. 29. Lake Pepin, also 



Tremapleau, Wis. Potsdam. 



Crepicephalus (Loganellus) ANYTUS H. & W., 1877; U. S. Geol. Expl., 



40th Par., vol. 4, p. 219, pi. 2, figs. 19-21. 



ANYTUS Wai., 1884; Pal. Eureka Dist., Mon. U. S. Geol. Survey, vol. 



8, p. 56, pi. 9, fig. 26. Schell Creek, Nev. Taconic. 



Lisostracus ANYTUS Brogg., 1886; Geol. Foren. Stock. Forhandl., vol. 

 8, p. 212. 



ATTLEBORENSIS, Shaler & Foerste, 1888; Bull. Mus. Comp. Zool. 



Harvard College, vol. 19, p. 39, pi. 2, fig. 14. Attleborough, Mass. 



- ATTLEBORENSIS Wai., 1890; 10th Eep. U. S. Geol. Survey, p. 649, pi. 



95, fig. 2. Olenellus zone. 

 Conoceph. aurora Hartt, 1868; Acadian Geology, p. 653. (See Ptycho- 



paria ouangondianus.) 

 Conoceph. BILLINGSI Shum., 1861; Am. Jour. Sci., 2d series, vol. 32, 



p. 220. Morgan Creek, Burnet Co., Texas. Taconic. 



Conoceph.? BINODOSUS Hall, 1863; 16th Rep. New York State Cab. Nat. 



Hist., p. 160, pi. 7, fig. 47. Osceola Mills, Wis. Potsdam. 



Solenopleura? BREVICEPS Wai., 1884; Pal. Eureka Dist., Mon. U. S. 



Geol. Survey, vol. 8, p. 49, pi. 10, fig. 9. Prospect Mt. group in 

 the Hamburg shale north of Adams Hill, Nev. Taconic. 



- BURNETENSIS Wai., 1880; Proc. U. S. Nat. Mus., vol. 13, p. 272, pi. 



21, fig. 1. Tatur Hill, Burnet Co., Texas. Taconic. 



Conocephalitcs CALYMENOIDES Whitf., 1878; Ann. Eep. Geol. Survey 



Wisconsin, 1877, p. 52. Eau Claire, Wis. Taconic. 



Conocephalites CALYMENOIDES Whitf., 1882; Geol. Wisconsin, vol. 4, 

 p. 179, pi. 3, figs. 2-5. 



CALYMENOIDES Wai., 1884; Pal. Eureka Dist., Mon. U. S. Geol. Survey, 



vol. 8, p. 48. 



Crepicephalus (Loganellus) CENTRALIS Whitf., 1880; Geol. Eesources 

 Black Hills Dakota, p. 341, pi. 2, figs. 21-24. Castle Creek, Black 

 Hills, Dakota. Taconic. 



- ? (subgenus?) clavata Wai., 1887; Am. Jour. Sci., 3d series, vol. 34, 



p. 198, pi. 1, fig. 3. \i miles south of North Granville, etc., 

 Washington Co., N. Y. (See Protypus clavata.) Taconic. 



